JP4697427B2 - Air conditioner - Google Patents

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JP4697427B2
JP4697427B2 JP2005337017A JP2005337017A JP4697427B2 JP 4697427 B2 JP4697427 B2 JP 4697427B2 JP 2005337017 A JP2005337017 A JP 2005337017A JP 2005337017 A JP2005337017 A JP 2005337017A JP 4697427 B2 JP4697427 B2 JP 4697427B2
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heat exchanger
fin
rear guider
air conditioner
blower
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JP2007139373A (en
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誠司 平川
浩司 吉川
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)
  • Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
  • Air-Flow Control Members (AREA)

Description

この発明は空気調和機に関するものであり、特に貫流送風機を有する室内機に関するものである。   The present invention relates to an air conditioner, and more particularly to an indoor unit having a once-through fan.

従来の空気調和機は、熱交換器に並設した複数のフィンの、クロスフローファンに近接した端縁部のうち、前記熱交換器の冷媒管のクロスフローファン側にくる端縁部に、同部位を冷媒管と平行に屈曲させて形成した屈曲部を、フィンの長さ方向に交互にずらして冷媒管の長さ方向に千鳥足状に配設している。(例えば、特許文献1参照。)。
また、クロスフローフアンのリアガイダの吸い込み側の端部に、リアガイダ部材の厚み方向に徐変する厚みを有し、断面形状が円弧状若しくは曲面上の曲線部を有する突起形状を形成して、リアガイダの端部における流体の流れの渦領域を最小限に押さえる空気調和機もある(例えば、特許文献2参照。)。
また、風向板が、送風機羽根車の外郭にほぼ沿って背面ドレンパンの前面上部から上方に延出し、背面側熱交換器上部からのドレン水を前記背面ドレンパンへ流す空気調和機もある(例えば、特許文献3参照。)。
The conventional air conditioner has a plurality of fins arranged side by side in the heat exchanger, of the end edges close to the cross flow fan, on the end edge portion on the cross flow fan side of the refrigerant pipe of the heat exchanger, The bent portions formed by bending the same part in parallel with the refrigerant pipe are alternately shifted in the length direction of the fins and arranged in a staggered pattern in the length direction of the refrigerant pipe. (For example, refer to Patent Document 1).
Further, the rear guider has a thickness that gradually changes in the thickness direction of the rear guider member at the end of the rear guider of the cross flow fan, and has a cross-sectional shape that has an arc shape or a curved portion on a curved surface. There is also an air conditioner that minimizes the vortex region of the fluid flow at the end of (see Patent Document 2, for example).
There is also an air conditioner in which the wind direction plate extends upward from the upper part of the front surface of the rear drain pan substantially along the outline of the blower impeller, and the drain water from the upper part of the rear heat exchanger flows to the rear drain pan (for example, (See Patent Document 3).

特開平5−203173号公報(第3頁、図1)JP-A-5-203173 (page 3, FIG. 1) 特開2000−291594号公報(第3頁、図1)JP 2000-291594 A (page 3, FIG. 1) 特開2003−185171号公報(第3頁、図1)JP 2003-185171 A (page 3, FIG. 1)

特許文献1では、熱交換器のクロスフローファンに最も接近する部分において、熱交換器のパイプ後流をクロスフローファンの翼が通過することに起因するNZ音を低減するものである。ファンの背面に配置する背面側熱交換器とリアガイダを有する構成で発生するNZ音、即ちリアガイダ上端近傍の渦を音源とするNZ音を低減することはできなかった。リアガイダ上端近傍の渦を音源とするNZ音は、パイプ後流をクロスフローファンの翼が通過する際のようにリアガイダ上端近傍のパイプ後流の風速の差には起因せず、背面側熱交換器とファンの間に設けられたリアガイダのファン側の近傍にできる渦に起因する。このため、特許文献1とは解決しようとする課題が異なるものであり、さらに、リアガイダが送風機と熱交換器との間に存在することで、特許文献1による構成をそのまま用いてもリアガイダ上端近傍の渦を音源とするNZ音を低減することはできないという問題点があった。   In patent document 1, in the part closest to the cross flow fan of the heat exchanger, the NZ sound caused by the passage of the blades of the cross flow fan through the pipe wake of the heat exchanger is reduced. It has not been possible to reduce the NZ sound generated by the configuration having the rear heat exchanger and the rear guider arranged on the back surface of the fan, that is, the NZ sound using the vortex near the upper end of the rear guider as a sound source. The NZ sound that uses the vortex near the upper end of the rear guider as a sound source is not caused by the difference in the wind speed of the pipe wake near the upper end of the rear guider as the blade of the cross flow fan passes through the wake of the pipe. This is caused by a vortex formed in the vicinity of the fan side of the rear guider provided between the container and the fan. For this reason, the problem to be solved is different from Patent Document 1, and the rear guider exists between the blower and the heat exchanger, so that the vicinity of the upper end of the rear guider is used even if the configuration according to Patent Document 1 is used as it is. There is a problem that it is not possible to reduce the NZ sound using the vortex of the sound source as a sound source.

また、特許文献2では、リアガイダ上端付近の渦を音源とするNZ音を低減することができるが、この様な形状のリアガイダでは実現が困難であるという問題点があった。例えば、成形時には、リアガイダに接続する空気調和機の背面の筐体と一体に成形するのが製造工程から見た場合に効率がよいのであるが、一体成形するためには、リアガイダと筐体との接続部の奥から開放部に向かって成形型が抜けるように広がっていなければならず、リアガイダの形状に制限を有する。また、熱交換器から垂れる露をリアガイダ部で受けるというドレンパン機能との両立、組立時に熱交換器を挿入する際の作業性との両立など、他の制約条件を満たすことができない場合があるという問題点があった。   Further, in Patent Document 2, it is possible to reduce NZ sound using a vortex near the upper end of the rear guider as a sound source, but there is a problem that it is difficult to realize with such a rear guider. For example, at the time of molding, it is efficient when viewed from the manufacturing process to form integrally with the housing on the back of the air conditioner connected to the rear guider. It must spread so that a shaping | molding die may come off from the back of a connection part toward an open part, and has a restriction | limiting in the shape of a rear guider. In addition, it may not be possible to satisfy other constraints such as compatibility with the drain pan function of receiving dew dripping from the heat exchanger at the rear guider and compatibility with workability when inserting the heat exchanger during assembly. There was a problem.

また、特許文献3による空気調和機では、リアガイダが複雑な形状であるため成形上の制約条件から設計自由度が制限されるという問題点があった。また、リアガイダが別部品なため部品点数が増加し製造工程も多くなり、高価になるという問題点があった。 Moreover, in the air conditioner by patent document 3, since the rear guider was a complicated shape, there existed a problem that a design freedom was restrict | limited from the restrictions on shaping | molding. Further, since the rear guider is a separate part, the number of parts is increased, the number of manufacturing processes is increased, and there is a problem that the cost is increased.

この発明は、上記のような問題点を解決するためになされたもので、リアガイダの形状などの設計自由度に影響することなく、かつリアガイダ上端付近の渦を音源とするNZ音を低減できる空気調和機を得ることを目的とするものである。   The present invention has been made in order to solve the above-described problems, and can reduce the NZ sound using the vortex near the upper end of the rear guider as a sound source without affecting the design freedom of the shape of the rear guider and the like. The purpose is to obtain a harmony machine.

この発明に係る空気調和機は、空気調和機筐体内に格納される送風機と、前記送風機の吸入側に前記送風機を囲むように設けられ、吸込口から流入する気流に沿うように複数のフィンの面が並設して配置され、前記気流と熱交換する熱交換器と、前記空気調和機筐体内の背面側に配置される前記熱交換器の端部に対向すると共に前記送風機に対向して設けられ、前記熱交換した気体が前記送風機の吹出側に導かれるように風路の一部を形成するリアガイダと、前記熱交換器の前記リアガイダとの対向部に設けられ、前記フィンの積層間隔が塞がれる程度に、前記フィンの端部の一部を押し曲げまたは押し下げて構成したフィン倒し、または前記フィンの一部を切り起こして構成した切り起こしである抵抗体とを備え、 前記抵抗体は、前記吸込口から前記熱交換器を通り前記リアガイダの前記熱交換器との対向側に流れる気流が前記リアガイダの上端部を回り込んで前記送風機の翼と干渉して発生する音を低減することを特徴とするものである。 An air conditioner according to the present invention includes a blower housed in an air conditioner casing, and a plurality of fins that are provided on the suction side of the blower so as to surround the blower and follow an airflow flowing from a suction port. Faces are arranged side by side, facing a heat exchanger that exchanges heat with the airflow, and an end of the heat exchanger that is placed on the back side in the air conditioner housing and facing the blower The fin gap is provided at a facing portion between a rear guider that forms a part of an air path so that the heat-exchanged gas is guided to the blower side of the blower, and the rear guider of the heat exchanger. A resistor that is configured to push down, bend or push down a part of the end of the fin so as to be closed, or to cut and raise a part of the fin. Body sucks said The airflow flowing from the mouth through the heat exchanger to the opposite side of the rear guider with respect to the heat exchanger reduces the sound generated by interfering with the blades of the blower around the upper end of the rear guider. To do.

この発明によれば、リアガイダの形状によらず、リアガイダ上端付近を通過する気流の流量を低減してNZ音を低減できる空気調和機が得られる効果がある。   According to the present invention, there is an effect that an air conditioner capable of reducing the NZ noise by reducing the flow rate of the airflow passing near the upper end of the rear guider regardless of the shape of the rear guider is obtained.

実施の形態1.
図1はこの発明の実施の形態1に係る空気調和機の室内機を示す断面構成図であり、室内機の側面に平行な面での断面構成を示している。空気調和機の室内機を構成する空気調和機筐体1が室内の壁面にその背面で固定され、室内に対向して正面上段側に前面パネル2と天面グリル3で覆われた空気の吸込口4を有する。また、正面下段側には空気の吹出口6となる開口を有し、室内機1の長手方向に伸びる軸を中心に回動可能な風向可変ベーン5が吹出口6に設けられ、吹出口6の開口の方向と大きさが可変に構成されている。室内機1内には吸込口4から吹出口6に至る風路が形成される。この風路の途中には、通過する室内空気の異物を除去するプレフィルタ7と、配管内を流れる冷媒と通過する室内空気とを熱交換する熱交換器8と、貫流送風機9が配置されている。貫流送風機9の上流側は熱交換器8で囲まれ、下流側は貫流送風機9の構成部材であるノズル部12とボックス部13で区画されて吹出風路を形成する。
Embodiment 1 FIG.
1 is a cross-sectional configuration diagram illustrating an indoor unit of an air conditioner according to Embodiment 1 of the present invention, and illustrates a cross-sectional configuration in a plane parallel to the side surface of the indoor unit. An air conditioner casing 1 constituting an indoor unit of an air conditioner is fixed to the wall surface of the room on its back surface, and sucks air covered with a front panel 2 and a top grill 3 on the upper front side facing the room. It has a mouth 4. Further, a wind direction variable vane 5 that has an opening serving as an air outlet 6 on the lower front side and is rotatable about an axis extending in the longitudinal direction of the indoor unit 1 is provided in the outlet 6. The direction and size of the opening are variable. An air path from the suction port 4 to the blowout port 6 is formed in the indoor unit 1. In the middle of this air path, a pre-filter 7 that removes foreign matter from the passing room air, a heat exchanger 8 that exchanges heat between the refrigerant flowing in the pipe and the passing room air, and a once-through fan 9 are arranged. Yes. The upstream side of the once-through blower 9 is surrounded by the heat exchanger 8, and the downstream side is partitioned by the nozzle portion 12 and the box portion 13 which are constituent members of the once-through blower 9 to form a blowout air passage.

貫流送風機9は羽根車10が、室内機1の長手方向に伸びる回転軸、即ち図1の紙面に垂直な回転軸を中心に回転することで、室内空気を吸込口4より吸い込んで吹出口6へ送風する。吸込口4のうちで、空気調和機の後方側の吸込口4から流入する空気と熱交換するように、貫流送風機9の背面には熱交換器8の一部である背面側熱交換器8aを配置している。また、羽根車10と背面側熱交換器8aとの間にはリアガイダ11が羽根車10の外周に沿うように設けられている。   In the once-through fan 9, the impeller 10 rotates around a rotation axis extending in the longitudinal direction of the indoor unit 1, that is, a rotation axis perpendicular to the paper surface of FIG. To blow. The back side heat exchanger 8a which is a part of the heat exchanger 8 is provided on the back surface of the once-through blower 9 so as to exchange heat with the air flowing in from the suction port 4 on the rear side of the air conditioner. Is arranged. A rear guider 11 is provided between the impeller 10 and the rear heat exchanger 8 a so as to follow the outer periphery of the impeller 10.

図1に示す室内機1に格納された熱交換器8は、通常、空気調和機の室外機に格納された圧縮機、室外熱交換器、減圧手段と共に冷凍サイクルを構成しており、接続配管内に冷媒を循環させている。そして、圧縮機で圧縮された高温高圧の冷媒ガスを凝縮器で凝縮し、気液二相状態または気相状態となった冷媒を減圧手段で減圧する。その後、低温低圧の液冷媒を蒸発器で蒸発し、高温になった冷媒ガスを再び圧縮機に吸入する。この冷凍サイクルで、室内機に格納された熱交換器を凝縮器として動作させると室内の暖房を行うことができ、蒸発器として動作させると室内の冷房を行うことができる。   The heat exchanger 8 stored in the indoor unit 1 shown in FIG. 1 normally constitutes a refrigeration cycle together with the compressor, outdoor heat exchanger, and decompression means stored in the outdoor unit of the air conditioner. A refrigerant is circulated inside. Then, the high-temperature and high-pressure refrigerant gas compressed by the compressor is condensed by the condenser, and the refrigerant in the gas-liquid two-phase state or the gas phase state is decompressed by the decompression means. Thereafter, the low-temperature and low-pressure liquid refrigerant is evaporated by the evaporator, and the refrigerant gas having reached a high temperature is again sucked into the compressor. In this refrigeration cycle, when the heat exchanger stored in the indoor unit is operated as a condenser, the room can be heated, and when operated as an evaporator, the room can be cooled.

次に空気調和機の動作について説明する。図1のように構成された空気調和機においては、まず、電源が投入され、熱交換器8に冷媒が流れ、送風機9の羽根車10が回転すると、吸込口4から吸い込まれた室内空気はプレフィルタ7を介して塵埃を除去したのち、熱交換器8に流れ、この熱交換器8の配管内を流れる冷媒と熱交換される。その後、吹出口6から室内へ吹き出され、再び吸込口4から吸い込まれる。この一連の動作が繰り返され、その結果、室内空気は塵埃を除去され、また熱交換器8の冷媒と熱交換することで冷やされたり温められたりすることとなり、室内空気の空気質は変化する。   Next, the operation of the air conditioner will be described. In the air conditioner configured as shown in FIG. 1, first, when the power is turned on, the refrigerant flows into the heat exchanger 8 and the impeller 10 of the blower 9 rotates, the indoor air sucked from the suction port 4 is After removing dust through the pre-filter 7, the dust flows to the heat exchanger 8 and is heat-exchanged with the refrigerant flowing in the pipe of the heat exchanger 8. Then, it blows out indoors from the blower outlet 6, and is sucked in from the suction inlet 4 again. This series of operations is repeated, and as a result, the indoor air is dedusted and cooled or warmed by exchanging heat with the refrigerant of the heat exchanger 8, and the air quality of the indoor air changes. .

ここで、リアガイダ11の形状に関わる制約は以下のとおりである。
背面側熱交換器8aから出てくる気流を送風機9の翼に導く。この時、気流が翼にスムーズに導かれるようにリアガイダ11の長さ及び角度が設計されている。
背面側熱交換器8aで生じた結露をリアガイダ11の背面側熱交換器8aとの対向面で受けて集め、室外に連結する配管に流す。このため、リアガイダ11はフィン14に生じた露が送風機9に落ちないように、十分な長さを確保する必要がある。
成形時には、リアガイダ11に接続する空気調和機の背面の筐体と一体に成形している。これは別部品を接続する構成にすると運転時の振動によって接続部分が不安定になったりするからである。このため、リアガイダ11と筐体との接続部の奥から開放部に向かって成形型が抜けるように広がっている必要がある。
組み立て時に、リアガイダ11と、これに接続する空気調和機の背面の筐体との間の空間に、背面側熱交換器8aを多少回転させながら斜め上方から挿入する。この際に、障害物とならないようにリアガイダ11の角度及び長さが設計されている。
Here, the restrictions regarding the shape of the rear guider 11 are as follows.
The airflow coming out from the back side heat exchanger 8a is guided to the blades of the blower 9. At this time, the length and angle of the rear guider 11 are designed so that the airflow is smoothly guided to the wing.
Condensation generated in the back side heat exchanger 8a is received and collected on the surface of the rear guider 11 facing the back side heat exchanger 8a, and flows to the pipe connected to the outside. For this reason, the rear guider 11 needs to secure a sufficient length so that dew generated on the fins 14 does not fall into the blower 9.
At the time of molding, it is molded integrally with the housing on the back surface of the air conditioner connected to the rear guider 11. This is because the connection portion becomes unstable due to vibration during operation if a configuration is used in which different parts are connected. For this reason, it is necessary to spread so that a shaping | molding die may come out from the back of the connection part of the rear guider 11 and a housing | casing toward an open part.
At the time of assembly, the back side heat exchanger 8a is inserted into the space between the rear guider 11 and the casing on the back side of the air conditioner connected to the rear guider 11 from an obliquely upper side while being slightly rotated. At this time, the angle and length of the rear guider 11 are designed so as not to be an obstacle.

図1に示す空気調和機は、上記の制約条件を満たすようにリアガイダ11及び背面側熱交換器8a付近を構成したものの一例である。
図2は背面側熱交換器8aの一部を示す斜視図である。熱交換器8は複数のフィン14とパイプ15で構成されており、複数のフィン14が並設され、フィン面に垂直な方向、即ちフィン4の積層方向に各フィン14を複数段及び複数列でパイプ15が貫通している。フィン14の長手方向を段方向、段方向に交わる方向を列方向と称する。図2に示す背面側熱交換器8aは、例えば上流側の列のパイプと中央の列のパイプと下流側の列のパイプの3列のパイプ15を有する。背面側熱交換器8aを構成する1つのフィン14において、フィン14の長手方向の一端部で、リアガイダ11と対向する対向部に、2つのフィン倒し16を備えている。ここで、背面側熱交換器8aのリアガイダ11との対向部とは、並設するフィン14の長手方向に伸びる下流側端面でリアガイダ11と対向する部分、及びこのフィンの下流側端面からパイプ15の一列程度上流側の位置も含むとする。また、並設する複数のフィン14のすべてに対し、例えば同様の位置で2箇所にフィン倒し16を設ける。
The air conditioner shown in FIG. 1 is an example in which the vicinity of the rear guider 11 and the rear side heat exchanger 8a is configured so as to satisfy the above-described constraint conditions.
FIG. 2 is a perspective view showing a part of the back side heat exchanger 8a. The heat exchanger 8 includes a plurality of fins 14 and pipes 15. The plurality of fins 14 are arranged in parallel, and each fin 14 is arranged in a plurality of stages and a plurality of rows in a direction perpendicular to the fin surface, that is, in the stacking direction of the fins 4. The pipe 15 penetrates. The longitudinal direction of the fins 14 is referred to as a step direction, and the direction intersecting with the step direction is referred to as a row direction. The back surface side heat exchanger 8a shown in FIG. 2 includes, for example, three rows of pipes 15 including an upstream row pipe, a central row pipe, and a downstream row pipe. In one fin 14 constituting the back side heat exchanger 8a, two fins 16 are provided at one end portion in the longitudinal direction of the fin 14 and facing the rear guider 11. Here, the facing portion of the rear side heat exchanger 8a facing the rear guider 11 is a portion facing the rear guider 11 at the downstream end surface extending in the longitudinal direction of the fins 14 arranged side by side, and the pipe 15 from the downstream end surface of this fin. It is assumed that the position on the upstream side is also included. Further, for example, fins 16 are provided at two positions at the same position with respect to all of the plurality of fins 14 arranged in parallel.

フィン倒し16は、フィン14の下流側端面をフィン面に対して上方に押し上げてまたは下方に押し下げて構成され、そのフィン面からフィン倒し16が並設するフィン間に突出した状態になっている。この実施の形態では、フィン14の下流側端面から2箇所の切り込みを入れ、切り込み間のフィンを押し上げまたは押し下げてフィン倒し16を構成している。このため、フィン倒し16はフィン面から垂直に四角形状に突出する。ここで、並設するフィンの積層間隔よりも長い切り込みをいれてフィン倒し16を形成すれば、フィン倒し16によってフィン14間は積層方向(即ち、送風機9の回転軸方向)に完全に塞がれる。 The fin faller 16 is configured by pushing the downstream side end face of the fin 14 upward or downward with respect to the fin surface, and the fin fall 16 protrudes between the fins juxtaposed from the fin face. . In this embodiment, two incisions are made from the downstream end face of the fin 14, and the fin tilting 16 is configured by pushing up or down the fin between the incisions. For this reason, the fin faller 16 protrudes perpendicularly from the fin surface in a square shape. Here, if the fin tilting 16 is formed by making a cut longer than the stacking interval between the fins arranged side by side, the fin tilting 16 completely closes the space between the fins 14 in the stacking direction (that is, the rotation axis direction of the blower 9). It is.

さらに、フィン倒し16は、背面側熱交換器8aを気流の下流側からその端面に略垂直方向に上流側を見たとき、最も下流側の列(以下、最下流列と記す)のパイプ15と重ならない領域に設けている。図2の斜線部Kは、気流の下流側からフィンの長手方向に対して略垂直に背面側熱交換器8aを見て、最も下流側列のパイプ15と重なるフィンの部分を示しており、この実施の形態ではフィン倒し16を例えば斜線部Kを除くパイプ間に設ける。
ここで、パイプ間とは、フィン長手方向の段方向に隣り合う2つのパイプの中心から中心までを示す。また斜線部Kをパイプ15に重なる位置と称し、斜線部K以外の位置をパイプ15に重ならない位置と称する。
さらに、例えば2つのフィン倒し16がリアガイダ11と対向する対向部のパイプ間に対応する部分に、背面側熱交換器8aのリアガイダ11と対向する側の一端部から吹込口4に向かって順に設けられている。図1の実施例では背面側熱交換器8aは鉛直方向から傾斜させて配設されているので、フィン倒し16は背面側熱交換器8aの下端部から上方に向かって、2つのパイプ間に対応する部分に順に設けられている。このとき、リアガイダ11の上端位置と同じ高さの位置Aに対応するパイプ間を少なくとも含むようにフィン倒し16が設けられている。Aは厳密に言えば、リアガイダ先端部11aからフィン14の長手方向に対して略垂直に下ろした垂線である。
また、フィン倒し16の幅L、段方向パイプ間距離DP、パイプ15の直径Dに対して、L/(DP−D)が例えば0.5以上となるようにフィン倒し16を構成する。この段方向パイプ間距離DPは、図に示すように、フィン長手方向の段方向に隣り合う2つのパイプの中心から中心までの距離とする。
Further, when the back surface side heat exchanger 8a is viewed from the downstream side of the air flow to the end surface thereof in the direction substantially perpendicular to the end surface, the fin faller 16 is connected to the pipe 15 in the most downstream row (hereinafter referred to as the most downstream row). It is provided in an area that does not overlap. A hatched portion K in FIG. 2 shows a fin portion that overlaps with the pipe 15 in the most downstream row when the rear heat exchanger 8a is viewed from the downstream side of the airflow substantially perpendicular to the longitudinal direction of the fin. In this embodiment, the fin faller 16 is provided between the pipes excluding the hatched portion K, for example.
Here, between pipes indicates from the center to the center of two pipes adjacent to each other in the step direction of the fin longitudinal direction. Further, the hatched portion K is referred to as a position overlapping the pipe 15, and the positions other than the hatched portion K are referred to as positions not overlapping the pipe 15.
Further, for example, the two fin fallers 16 are provided in order from the one end of the back side heat exchanger 8 a facing the rear guider 11 toward the blow-in port 4 at a portion corresponding to the space between the pipes facing the rear guider 11. It has been. In the embodiment of FIG. 1, the rear side heat exchanger 8a is disposed so as to be inclined from the vertical direction, so that the fin faller 16 is located between the two pipes upward from the lower end of the rear side heat exchanger 8a. Corresponding portions are provided in order. At this time, the fin faller 16 is provided so as to include at least the space between the pipes corresponding to the position A having the same height as the upper end position of the rear guider 11. Strictly speaking, A is a perpendicular line extending substantially perpendicularly to the longitudinal direction of the fin 14 from the rear guider tip 11a.
Further, the fin incline 16 is configured so that L / (DP-D) is, for example, 0.5 or more with respect to the width L of the fin incline 16, the distance DP between the pipes in the stage direction, and the diameter D of the pipe 15. As shown in the figure, the step-direction pipe distance DP is a distance from the center to the center of two pipes adjacent to each other in the step direction in the fin longitudinal direction.

以下に、リアガイダ11近傍の空気流について説明する。背面側熱交換器8aのフィン面には矢印で示すように、吸込口4から流入した室内空気が気流Pとなって上流側から下流側へ流れる。パイプ15にぶつかった空気は2分されてパイプ15の外周に沿って流れ、パイプ15の後方の領域Kでは速度が遅くなる。フィン14面を局所的に見ると気流の方向はパイプ15のために方向を変えつつ流れるのであるが、全体的には図に示すように、背面側熱交換器8aのフィン14面に沿ってフィン14の長手方向に対して略垂直に流れる。   Hereinafter, the air flow in the vicinity of the rear guider 11 will be described. As indicated by an arrow, the indoor air flowing in from the suction port 4 flows into the fin surface of the rear side heat exchanger 8a as an air flow P and flows from the upstream side to the downstream side. The air hitting the pipe 15 is divided into two parts and flows along the outer periphery of the pipe 15, and the speed is reduced in a region K behind the pipe 15. When the fin 14 surface is viewed locally, the direction of the airflow flows while changing the direction for the pipe 15, but as a whole, as shown in the figure, along the fin 14 surface of the back side heat exchanger 8a. It flows substantially perpendicular to the longitudinal direction of the fin 14.

図3はリアガイダ11付近を拡大して気流を説明する説明図である。送風運転時に、背面側熱交換器8aの一端部を通過する気流は、リアガイダ11や空気調和機筐体1に流路を妨げられて、リアガイダ11の背面側からリアガイダ先端部11aに流れる。このとき、リアガイダ先端部11aを回り込んで流れる風の流れと羽根車の翼との干渉によって発生するNZ音(周波数がファンの回転数N×ブレード枚数Zの定数倍となる狭帯域音)が聴感的に耳障りで不快であるため問題になる。
図3(a)はフィン倒し16を設けていない構成での空気の流れを示す説明図である。吸込口4から背面側熱交換器8aのリアガイダ11の近くに位置する一端部を通った気流は、図に示すように、リアガイダ11と背面側熱交換器8aとの間を流れる。そして、リアガイダ11の背面側熱交換器8aとの対向側から、リアガイダ先端部11aを回り込み、羽根車10に対して大きく入り込むような方向に流れ込む。リアガイダ11の上端部付近の流れPは、リアガイダ上端部11aから羽根車側に流入する際に剥離し、渦領域Sを形成しつつ、羽根車10の影響を受けることにより再びリアガイダ11側に近づく。その後、リアガイダ11に沿って流れて吹出口6に流れる。
このようにリアガイダ11の背面側熱交換器8aとの対向側からリアガイダ先端部11aを回り込んで流れる気流のため、リアガイダ11上端部付近の渦領域SにNZ音の原因となる大きな渦が生じていると考えられる。
FIG. 3 is an explanatory diagram for explaining the airflow by enlarging the vicinity of the rear guider 11. During the air blowing operation, the airflow passing through one end portion of the rear side heat exchanger 8a flows from the rear side of the rear guider 11 to the rear guider tip portion 11a while being blocked by the rear guider 11 and the air conditioner casing 1. At this time, an NZ sound (a narrow-band sound whose frequency is a constant multiple of the number of rotations N of the fan and the number of blades Z) is generated by the interference between the wind flow flowing around the rear guider tip 11a and the blades of the impeller. It becomes a problem because it is unpleasant and uncomfortable.
FIG. 3A is an explanatory view showing the flow of air in a configuration in which the fin faller 16 is not provided. As shown in the figure, the airflow passing through the suction port 4 and one end located near the rear guider 11 of the rear side heat exchanger 8a flows between the rear guider 11 and the rear side heat exchanger 8a. Then, from the opposite side of the rear guider 11 to the back side heat exchanger 8 a, the rear guider 11 a wraps around the rear guider tip 11 a and flows into the impeller 10. The flow P in the vicinity of the upper end portion of the rear guider 11 is separated when it flows from the rear guider upper end portion 11a to the impeller side, forms a vortex region S, and approaches the rear guider 11 side again by being influenced by the impeller 10. . Then, it flows along the rear guider 11 and flows to the outlet 6.
In this way, due to the airflow flowing around the rear guider tip 11a from the opposite side of the rear guider 11 to the rear side heat exchanger 8a, a large vortex causing NZ sound is generated in the vortex region S near the upper end of the rear guider 11. It is thought that.

図3(b)はこの実施の形態によるフィン倒し16があるときの空気の流れを示す説明図である。背面側熱交換器8aのリアガイダ11との対向部に設けられたフィン倒し16は、この部分に流れる気流Pを妨げるように作用する。即ち、フィン倒し16によって、吸込口4から背面側熱交換器8aの下方側の一端部を通って領域Qに流れる気流の流量は図3(a)の構成よりも減少する。このため、リアガイダ11の背面側から先端部11aに回って流れる気流の流量も図3(a)の構成よりも減少する。リアガイダ11上端部付近の気流の流量は少なくなり、図3(a)と比べると羽根車10にそれほど深く入り込まずにリアガイダ11の面に沿うように流れ、渦領域Sの渦は小さくなる。従って、リアガイダ11上端部付近にできる渦が発生源となっているNZ音を低減でき、低騒音化を図ることができる。 FIG.3 (b) is explanatory drawing which shows the flow of air when there exists the fin faller 16 by this embodiment. The fin inversion 16 provided in the part facing the rear guider 11 of the back side heat exchanger 8a acts so as to prevent the airflow P flowing through this part. That is, the fin fall 16 reduces the flow rate of the airflow flowing from the suction port 4 through the lower end of the back side heat exchanger 8a to the region Q as compared with the configuration of FIG. For this reason, the flow rate of the airflow that flows from the rear side of the rear guider 11 to the tip end portion 11a is also reduced as compared with the configuration of FIG. The flow rate of the airflow in the vicinity of the upper end portion of the rear guider 11 is reduced, and it flows along the surface of the rear guider 11 without entering the impeller 10 so deeply as compared with FIG. Therefore, it is possible to reduce the NZ sound that is caused by the vortex generated near the upper end of the rear guider 11 and to reduce the noise.

図4は、最下流列のパイプ15と重ならない部分のフィン倒し16の幅L、即ちここではフィン倒し16の幅L、熱交換器8aの段方向パイプ間距離DP、パイプ直径Dとし、横軸にL/(DP−D)、縦軸にNZ音レベル(dB)を示すグラフである。ここでNZ音レベルは、JIS測定点、即ち空気調和機の室内ユニットの前面中心より前方に1m程度、下方に0.8m程度の位置で測定し、周波数分析をしたときのピーク値(dB)を示す。図4によれば、L/(DP−D)≧0.5とするとNZ音レベルは急激に改善されている。
フィン倒し16は背面側熱交換器8aの下方で空気流Pを妨げるように作用し、特にL/(DP−D)≧0.5にすることで、領域Qのリアガイダ11の背面側から先端部11aに回って流れる空気の流量を効果的に減少させ、NZ音を低減させる。
FIG. 4 shows the width L of the fin fall 16 that does not overlap the pipes 15 in the most downstream row, that is, the width L of the fin fall 16 here, the distance DP between the pipes in the stage direction of the heat exchanger 8a, and the pipe diameter D. It is a graph which shows L / (DP-D) on an axis | shaft and NZ sound level (dB) on a vertical axis | shaft. Here, the NZ sound level is measured at a JIS measurement point, that is, about 1 m forward and 0.8 m below the front center of the indoor unit of the air conditioner, and a peak value (dB) when frequency analysis is performed. Indicates. According to FIG. 4, when L / (DP-D) ≧ 0.5, the NZ sound level is rapidly improved.
The fin faller 16 acts to block the air flow P below the rear side heat exchanger 8a, and in particular by setting L / (DP-D) ≧ 0.5, the tip from the rear side of the rear guider 11 in the region Q The flow rate of the air flowing around the portion 11a is effectively reduced, and the NZ sound is reduced.

なお、図2に示した構成では、背面側熱交換器8aを下流側から略垂直に上流側に見て最下流列のパイプ15と重ならない位置にフィン倒し16を設けているが、これに限るものではない。少なくとも最下流列のパイプ15と重ならない位置にフィン倒し16が存在すれば、最下流列のパイプ15と重なる部分にさらにフィン倒し16が存在してもよい。即ち領域Kにも抵抗体が設けられていてもよい。
ただし、その場合には図4に示す関係のフィン倒しの幅Lは、1つのパイプ間に対して最下流列のパイプ15に重ならない領域(DP−D)におけるフィン倒し16のフィン長手方向の長さとする。少なくとも最下流列のパイプ15と重ならない位置にL/(DP−D)≧0.5のフィン倒し16が存在すれば、最下流列のパイプ15と重なる部分にさらにフィン倒し16が存在しても、流量を減らす効果は同程度、または同程度以上となるため、NZ音を低減する効果が得られる。
In the configuration shown in FIG. 2, the fin side 16 is provided at a position where the rear side heat exchanger 8 a is not substantially overlapped with the pipe 15 in the most downstream row when viewed from the downstream side substantially vertically to the upstream side. It is not limited. If the fin fall 16 exists at a position that does not overlap with at least the pipes 15 in the most downstream row, the fin fall 16 may further exist in a portion that overlaps with the pipes 15 in the most downstream row. That is, a resistor may also be provided in the region K.
In this case, however, the width L of the fin fall in the relationship shown in FIG. 4 is the length in the fin longitudinal direction of the fin fall 16 in the region (DP-D) that does not overlap the pipe 15 in the most downstream row with respect to one pipe. Length. If there is a fin collapse 16 of L / (DP-D) ≧ 0.5 at a position that does not overlap at least the pipe 15 in the most downstream row, there is a further fin collapse 16 in a portion that overlaps with the pipe 15 in the most downstream row. However, since the effect of reducing the flow rate is the same level or higher, the effect of reducing the NZ sound can be obtained.

また、図2に示した構成では、フィン倒し16によって並設するフィン14の積層間隔が塞がれる程度にフィン14を押し上げまたは押し下げるように構成したが、これに限るものではない。並設するフィン14の積層間隔が完全に塞がれなくても、吸込口4から背面側熱交換器8aを通りリアガイダ11の背面側熱交換器8aとの対向側、即ち領域Qに流れる気流を妨げるようにフィン倒し16を設けることで、フィン倒し16を設けない場合に比べてNZ音を低減できる。
また、ここではフィン倒し16を2箇所としたが、1箇所以上設ければ、NZ音低減の効果は得られる。フィン倒し16を複数個設ける際は、熱交換器8aのパイプ間に対応する位置で、下方の一端側から吸込口4側に向かって順番にフィン倒し16を設けるのが望ましい。熱交換器8aの下方のパイプ間から順に上方に向かってパイプ間毎にフィン倒し16を設けることで、リアガイダ11付近の気流の流量を効果的に低減できる。
In the configuration shown in FIG. 2, the fins 14 are pushed up or pushed down to the extent that the stacking interval of the fins 14 arranged in parallel by the fin tilters 16 is blocked. However, the present invention is not limited to this. Even if the stacking interval of the fins 14 arranged side by side is not completely blocked, the airflow flows from the suction port 4 through the back side heat exchanger 8a to the opposite side of the rear guider 11 to the back side heat exchanger 8a, that is, to the region Q. By providing the fin tilting 16 so as to prevent the NZ noise, the NZ sound can be reduced as compared with the case where the fin tilting 16 is not provided.
In addition, here, the fin knockers 16 are provided in two places, but if one or more places are provided, the effect of reducing the NZ sound can be obtained. When providing a plurality of fins 16, it is desirable to provide the fins 16 in order from the lower one end side to the suction port 4 side at a position corresponding to between the pipes of the heat exchanger 8 a. By providing fin fins 16 between the pipes in the order from the lower pipe of the heat exchanger 8a, the flow rate of the airflow in the vicinity of the rear guider 11 can be effectively reduced.

また、図2では並設する複数のフィン14に対し、背面側熱交換器8aの下端から同じ位置にフィン倒し16を設けたが、これに限るものではない。例えば、フィン14のそれぞれにおいて、フィン長手方向にずらした位置にフィン倒し16を設けてもよい。
また、図2に示した構成では、背面側熱交換器8aのリアガイダ11との対向部にフィン倒し16を設けるとしたが、これに限るものではない。吸込口4から背面側熱交換器8aを通り、リアガイダ11の背面側熱交換器8aとの対向側に流れる気流を妨げるようにフィン倒し16を設ければよい。例えば背面側熱交換器8aの一端部で上流側のフィン14の部分や、背面側熱交換器8aの下端面のフィン14の部分も、吸込口4から背面側熱交換器8aを通り、リアガイダ11の背面側熱交換器8aとの対向側に流れる気流の通り道であるので、この部分に流れに対して抵抗手段となるフィン倒しを設けてもよい。
In FIG. 2, fins 16 are provided at the same position from the lower end of the back-side heat exchanger 8 a for the plurality of fins 14 arranged side by side, but the present invention is not limited to this. For example, in each of the fins 14, the fin tilting 16 may be provided at a position shifted in the fin longitudinal direction.
Moreover, in the structure shown in FIG. 2, although the fin fall 16 was provided in the opposing part with the rear guider 11 of the back surface side heat exchanger 8a, it does not restrict to this. It is only necessary to provide the fin tilting 16 so as to prevent the airflow flowing from the suction port 4 through the back side heat exchanger 8a to the opposite side of the rear guider 11 to the back side heat exchanger 8a. For example, the upstream fin 14 portion at one end of the rear heat exchanger 8a and the fin 14 portion at the lower end surface of the rear heat exchanger 8a also pass through the rear heat exchanger 8a from the suction port 4 to the rear guider. 11 is a passage of the airflow flowing on the side opposite to the rear surface side heat exchanger 8a, and therefore, a fin fall which serves as a resistance means against the flow may be provided in this portion.

また、他の構成例として、例えばリアガイダ11の背面の領域Qには空気が全く流れないように抵抗体を設けてもよい。例えば背面側熱交換器8aを短くして上方側だけ残し、その背面熱交換器8aの下方に接続してリアガイダ11との対向部に抵抗板を設け、領域Qへの流路を塞ぎかつ露をリアガイダ11の背面に導くようにしてもよい。リアガイダ11の背面に空気を全く流れないようにした場合、渦領域Sの渦の減少効果は大きなものが得られる。図4に示すグラフにおいて、L/(DP−D)が1.0よりも大きくしたのと同等の構成になるので、NZ音レベルの低減効果は大きなものとなる。ただし、図1の構成のようにリアガイダ11の背面に少量の空気を流して背面側熱交換器8aで熱交換するように構成すれば、NZ音レベルは多少上がるが、熱交換性能を向上でき、ファン入力を低減できるという有利な点がある。   As another configuration example, for example, a resistor may be provided in the region Q on the back surface of the rear guider 11 so that no air flows. For example, the back side heat exchanger 8a is shortened and left only on the upper side, connected to the lower side of the back side heat exchanger 8a, and provided with a resistance plate at a portion facing the rear guider 11, thereby closing the flow path to the region Q and exposing it. May be guided to the rear surface of the rear guider 11. When air is not allowed to flow at all on the rear surface of the rear guider 11, a large effect of reducing the vortex in the vortex region S can be obtained. In the graph shown in FIG. 4, L / (DP-D) has the same configuration as when it is larger than 1.0, so that the effect of reducing the NZ sound level is great. However, if the rear-side heat exchanger 8a is configured to flow a small amount of air to the rear side of the rear guider 11 as in the configuration of FIG. 1, the NZ sound level is slightly increased, but the heat exchange performance can be improved. There is an advantage that fan input can be reduced.

このように、空気調和機筐体内に格納される送風機と、前記送風機の吸入側に前記送風機を囲むように設けられ吸込口から流入する気体と熱交換する熱交換器と、前記空気調和機筐体内の背面側に配置される前記熱交換器の端部に対向すると共に前記送風機に対向して設けられ、前記熱交換した気体が前記送風機の吹出側に導かれるように風路の一部を形成するリアガイダと、前記吸込口から前記熱交換器を通り前記リアガイダの前記熱交換器との対向側に流れる気流を妨げる抵抗手段と、を備えたことにより、抵抗手段16を設けない構成に比べ、領域Qのリアガイダ11の背面側から先端部11aに回って流れる空気の流量を減少できる。これにより、リアガイダの形状などの設計自由度に影響することなく、リアガイダ11の送風機9側に発生する渦領域Sの渦を小さくして、この渦に起因するNZ音を低減でき、使用者が快適に使用できる空気調和機が得られる効果がある。 As described above, the blower stored in the air conditioner casing, the heat exchanger provided on the suction side of the blower so as to surround the blower and exchanging heat with the gas flowing in from the suction port, and the air conditioner casing A part of the air passage is provided so as to face the end of the heat exchanger disposed on the back side of the body and to face the blower, and to guide the heat exchanged gas to the blowout side of the blower. Compared to the configuration in which the resistance means 16 is not provided by including the rear guider to be formed and the resistance means for blocking the airflow flowing from the suction port through the heat exchanger to the opposite side of the rear guider to the heat exchanger. The flow rate of air flowing from the rear side of the rear guider 11 in the region Q to the front end portion 11a can be reduced. Accordingly, the vortex of the vortex region S generated on the blower 9 side of the rear guider 11 can be reduced without affecting the design freedom such as the shape of the rear guider, and the NZ sound caused by this vortex can be reduced. There is an effect that an air conditioner that can be used comfortably is obtained.

また、抵抗手段として、熱交換器8aのリアガイダ11との対向部に設けた抵抗体16としたことにより、リアガイダ11がどのような形状であっても、リアガイダ11の背面側から先端部11aに回って流れる空気の流量を減少できる。このため、リアガイダ成形上の制約条件を満足でき、熱交換器から垂れる露をリアガイダ部で受ける機能を満たし、組立時に熱交換器を挿入する際の作業性も保持できる構成で、確実に、効果的にNZ音を低減することができる。 Further, as the resistance means, the resistor 16 provided at the portion facing the rear guider 11 of the heat exchanger 8a is used, so that the rear guider 11 has any shape from the rear side of the rear guider 11 to the tip end portion 11a. The flow rate of air flowing around can be reduced. For this reason, it is possible to satisfy the constraints on the rear guider molding, satisfy the function of receiving dew dripping from the heat exchanger at the rear guider part, and maintain the workability when inserting the heat exchanger during assembly. NZ sound can be reduced.

また、熱交換器8aを、並設する複数のフィン14の面が気流に沿うように配置し、抵抗手段を、前記フィンの端部の一部を曲げて前記気流を妨げるように構成したフィン倒し16としたことにより、簡単な構成で、効果的にNZ音を低減することができる。 Further, the heat exchanger 8a is arranged so that the surfaces of the plurality of fins 14 arranged in parallel are along the air flow, and the resistance means is a fin configured to bend a part of the end portion of the fin to prevent the air flow. By using the declination 16, the NZ sound can be effectively reduced with a simple configuration.

また、熱交換器8aを、並設する複数のフィン14とフィン14の面を略垂直に複数段及び複数列で貫通するパイプ15を有する構成とし、フィン14の面を気流に沿うように配置し、熱交換器8aを気流の下流側からその端面に略垂直方向に上流側を見たときに、熱交換器8aを構成するパイプ15の最下流列に重ならない領域を少なくとも含むように抵抗体16を設けたことにより、熱交換性能を保持し、効果的にNZ音を低減でき、使用者が快適に使用できる空気調和機が得られる。 Further, the heat exchanger 8a is configured to include a plurality of fins 14 arranged side by side and a pipe 15 that penetrates the surfaces of the fins 14 in a plurality of stages and a plurality of rows substantially perpendicularly, and the surfaces of the fins 14 are arranged along the airflow. When the heat exchanger 8a is viewed from the downstream side of the airflow in the direction substantially perpendicular to the end face thereof, the resistance is set so as to include at least a region that does not overlap the most downstream row of the pipes 15 constituting the heat exchanger 8a. By providing the body 16, it is possible to obtain an air conditioner that maintains heat exchange performance, can effectively reduce NZ noise, and can be used comfortably by the user.

また、最下流列を構成するパイプ15のうちの1つのパイプ間において、熱交換器8aを気流の下流側からその端面に略垂直方向に上流側を見たときに、1つのパイプ間に対して最下流列のパイプ15に重ならない領域における抵抗体16のフィン長手方向の長さLが、パイプ間距離DP及びパイプの直径Dとして、L/(DP−D)≧0.5となるように抵抗体16を構成したことにより、確実に低騒音化を図ることができ、使用者が快適に使用できる空気調和機が得られる。 Further, when the heat exchanger 8a is viewed from the downstream side of the airflow to the end surface in the direction substantially perpendicular to the end surface between the one pipes 15 constituting the most downstream row, The length L in the fin longitudinal direction of the resistor 16 in the region not overlapping the pipes 15 in the most downstream row is such that L / (DP−D) ≧ 0.5 as the inter-pipe distance DP and the pipe diameter D. By configuring the resistor 16 to the above, an air conditioner that can reliably reduce noise and can be used comfortably by the user is obtained.

また、フィン14の長手方向に対し、熱交換器8aの一端部から吸込口4側に向かって、リアガイダ11との対向部でかつ気流の最下流列のパイプ間に対応する位置に順に抵抗体16を設けたことにより、効果的に確実に低騒音化を図ることができる。 Further, with respect to the longitudinal direction of the fin 14, the resistors are sequentially arranged at positions corresponding to the rear guider 11 and between the pipes in the most downstream row of the airflow from one end of the heat exchanger 8 a toward the suction port 4. By providing 16, the noise can be effectively and reliably reduced.

ここで、背面側熱交換器8aの一端部から吸込口4側へ向かって、即ち背面側熱交換器8aの下端から上方に向かって、リアガイダ11との対向部でかつ気流の最下流列のパイプ間に対応する位置に順に複数箇所に抵抗体としてフィン倒し16を設けた構成とする。図5は、パイプ間の位置の複数箇所にフィン倒し16を設けたときの、一番上のフィン倒し16の上端位置とNZ音レベルの関係を示すグラフであり、横軸にフィンふさぎ領域の上端位置(mm)、縦軸にNZ音レベル(dB)を示す。このフィンふさぎ領域とは、フィン14間を流れる気流に対し、フィン倒し16を設けることで並設するフィンのフィン間の流路がふさがれる領域で、フィン14の長手方向で吸込口4に近い位置を示す。図5中の縦に引いた点線は、リアガイダ先端部11aから背面側熱交換器8aのフィン長手方向に略垂直に引いた垂線Aと背面側熱交換器8aの下流側端面との交点(図1に示す)を示している。また、NZ音の計測位置は図4での計測位置と同様である。 Here, from one end of the back side heat exchanger 8a toward the suction port 4 side, that is, upward from the lower end of the back side heat exchanger 8a, the portion facing the rear guider 11 and the most downstream row of the airflow It is set as the structure which provided the fin fall 16 as a resistor in order at the position corresponding to between pipes. FIG. 5 is a graph showing the relationship between the upper end position of the uppermost fin knocker 16 and the NZ sound level when fin pushers 16 are provided at a plurality of positions between the pipes. The horizontal axis represents the fin blocking area. The upper end position (mm) and the vertical axis indicate the NZ sound level (dB). The fin blocking region is a region where the flow path between fins arranged side by side by closing the fins 16 with respect to the airflow flowing between the fins 14 is blocked, and is close to the suction port 4 in the longitudinal direction of the fins 14. Indicates the position. The dotted line drawn vertically in FIG. 5 is the intersection of the perpendicular A drawn from the rear guider tip 11a substantially perpendicular to the fin longitudinal direction of the rear heat exchanger 8a and the downstream end face of the rear heat exchanger 8a (see FIG. 5). 1). The measurement position of the NZ sound is the same as the measurement position in FIG.

即ち、図5はフィンふさぎ領域の上端位置をリアガイダ先端部11aに対して変化させたときのNZ音レベルを計測した結果である。
この計測結果が示しているのは、フィン倒し16を背面側熱交換器8aの下方からパイプ間に対応する位置に順次設けていった場合、垂線Aの位置にフィンふさぎ領域の上端位置が達するまでは、徐々にNZ音レベルが低減していく。さらに、垂線Aと背面側熱交換器8aとの交点の位置までフィンふさぎ領域が達した後は、それ以上に吸込口4側にフィン倒し16を設けても、NZ音レベルはそれほど低減しないことがわかる。
That is, FIG. 5 shows the result of measuring the NZ sound level when the upper end position of the fin blocking area is changed with respect to the rear guider tip 11a.
This measurement result shows that the fin end 16 reaches the position of the perpendicular line A at the upper end position of the fin blocking area when the fin tilters 16 are sequentially provided at positions corresponding to between the pipes from the lower side of the rear heat exchanger 8a. Until then, the NZ sound level gradually decreases. Furthermore, after the fin blocking area has reached the position of the intersection of the perpendicular line A and the back side heat exchanger 8a, the NZ sound level should not be reduced so much even if a fin-inclining 16 is provided on the suction port 4 side. I understand.

このことから、リアガイダ先端部11a付近では垂線Aの位置に応じて以下のようにフィン倒し16を設けると、NZ音レベルを効果的に低減できる。
図6はリアガイダ先端部11a付近における背面側熱交換器8aのリアガイダ対向部にフィン倒し16を設けた具体例を示す説明図である。垂線Aは、リアガイダ先端部11aから背面側熱交換器8aに対し、フィンの長手方向に略垂直に下ろした線である。図6(a)では垂線Aが気流の最下流列のパイプ15aの中心とパイプ15bの中心の間を通っている。このような場合には、パイプ間15a−15bにフィン倒し16を設ける。この時、パイプ間15a−15bよりも下方のリアガイダ11との対向部に位置するパイプ間のそれぞれにもフィン倒し16を設ける。また、フィン倒し16を設ける際には、前記のように、背面側熱交換器8aを気流の下流側からその端面に略垂直方向に上流側を見たときに、少なくとも最下流列のパイプ15に重ならない領域にフィン倒し16を設ければよい。リアガイダ先端部11a付近ではフィン倒し16、パイプ15a、15bが気流に対して抵抗体となる。このため、気流Pのように流れ、リアガイダ先端部11aの背面側熱交換器8aとの対向側を通って先端部11aに回り込む流れを妨げるので、NZ音レベルを低減できる。
For this reason, the NZ sound level can be effectively reduced by providing the fin inversion 16 in the vicinity of the rear guider tip 11a in accordance with the position of the perpendicular A as follows.
FIG. 6 is an explanatory view showing a specific example in which fins 16 are provided at the rear guider facing portion of the rear heat exchanger 8a in the vicinity of the rear guider tip portion 11a. The perpendicular line A is a line drawn substantially perpendicularly to the longitudinal direction of the fins from the rear guider tip 11a to the back side heat exchanger 8a. In FIG. 6A, the perpendicular line A passes between the center of the pipe 15a and the center of the pipe 15b in the most downstream row of the airflow. In such a case, the fin fall 16 is provided between the pipes 15a-15b. At this time, the fins 16 are also provided between the pipes located at the facing portions of the rear guider 11 below the pipes 15a-15b. Further, when the fin faller 16 is provided, as described above, when the rear side heat exchanger 8a is viewed from the downstream side of the air flow to the end surface thereof in the direction substantially perpendicular to the end face, at least the most downstream line of pipes 15 is provided. What is necessary is just to provide the fin fall 16 in the area | region which does not overlap. In the vicinity of the rear guider tip 11a, the fin knockers 16 and the pipes 15a and 15b serve as resistances against the airflow. For this reason, since it flows like the airflow P and the flow which goes around to the front-end | tip part 11a through the opposing side with the back side heat exchanger 8a of the rear guider front-end | tip part 11a is prevented, NZ sound level can be reduced.

また、図6(b)では垂線Aが気流の最下流列のパイプ15aの中心とパイプ15cの中心の間を通っている。このような場合には、パイプ間15a−15cにフィン倒し16を設け、以下は図6(a)の場合と同様である。この時、フィンふさぎ領域は図5では垂線Aとの交点よりも下方となるが、気流の最下流列のパイプ15aが抵抗体となるので、NZ音レベルは図6(a)と同様に低減できる。
なお、垂線Aがパイプ15aの中心を通る場合には、図6(a)、(b)のどちらの構成でもよい。
また、図5に示すように、フィン14の長手方向で、さらに吸込口4側に位置するパイプ間にフィン倒し16を設けても、NZ音レベル低減効果には変わりはない。これとは逆に、気流の流量低減によって熱交換性能の低減や、送風機入力上昇につながるので、これより吸込口4側の上方のパイプ間にはフィン倒し16を設けないほうがよい。
In FIG. 6B, the perpendicular A passes between the center of the pipe 15a in the most downstream row of the airflow and the center of the pipe 15c. In such a case, fins 16 are provided between the pipes 15a-15c, and the following is the same as in the case of FIG. At this time, the fin blocking region is below the intersection with the perpendicular A in FIG. 5, but the NZ sound level is reduced as in FIG. 6A because the pipe 15a in the most downstream row of the airflow becomes a resistor. it can.
In addition, when the perpendicular line A passes through the center of the pipe 15a, the structure shown in FIGS. 6A and 6B may be used.
Further, as shown in FIG. 5, even if the fin tilting 16 is provided between the pipes located on the suction port 4 side in the longitudinal direction of the fin 14, the NZ sound level reducing effect is not changed. On the contrary, since the heat exchange performance is reduced and the blower input is increased by reducing the flow rate of the airflow, it is better not to provide the fin tilting 16 between the upper pipes on the suction port 4 side.

このように、リアガイダの先端部11aからフィン14の長手方向に対して略垂直に下ろした垂線Aが通る位置の気流の最下流列のパイプ間を含み、フィン14の長手方向でリアガイダ11との対向部に位置する最下流列のパイプ間であって、熱交換器8aを前記気流の下流側からその端面に略垂直方向に上流側を見たときに、少なくとも最下流列のパイプ15に重ならない領域に抵抗体16を設けることにより、NZ音レベルを効果的に低減できる。 In this way, it includes between the pipes in the most downstream row of the airflow at a position where the perpendicular line A drawn from the front end portion 11a of the rear guider substantially perpendicularly to the longitudinal direction of the fin 14 passes, and between the pipes in the longitudinal direction of the fin 14 and the rear guider 11 When the heat exchanger 8a is viewed from the downstream side of the airflow to the end surface thereof in a direction substantially perpendicular to the end surface between the pipes in the most downstream row located in the opposing portion, at least the pipe 15 in the most downstream row is overlapped. The NZ sound level can be effectively reduced by providing the resistor 16 in the region that does not become necessary.

また、上記では図1に示すような構成の空気調和機に適用したが、背面側熱交換器8aを出た気流は、熱交換器8aと垂直の方向に吹き出るため、リアガイダ11の長さや熱交換器8aの段方向パイプ間距離DPが図1と異なる場合でも、前述のように抵抗体16を設けることで、NZ音を低減できる効果がある。即ち、前述のリアガイダ11の形状は図1に限るものではない。リアガイダ11の形状はどのような制約条件も満足でき、かつ騒音低減の効果を奏するので、使用者が快適に使用できる空気調和機を得ることができる。 Moreover, although it applied to the air conditioner of the structure as shown in FIG. 1 above, since the airflow which exited the back side heat exchanger 8a blows off in the direction perpendicular | vertical to the heat exchanger 8a, the length of the rear guider 11 and heat Even when the distance between pipes DP in the stage direction of the exchanger 8a is different from that in FIG. 1, providing the resistor 16 as described above has an effect of reducing NZ noise. That is, the shape of the aforementioned rear guider 11 is not limited to FIG. Since the shape of the rear guider 11 can satisfy any constraint condition and has an effect of reducing noise, an air conditioner that can be used comfortably by the user can be obtained.

図7は、この実施の形態による空気調和機の他の構成に係り、背面側熱交換器8aの一部を示す斜視図である。図において、図2と同一符号は同一、または相当部分を示す。
この構成例では、吸込口4から背面側熱交換器8aを通りリアガイダ11の背面側熱交換器8aとの対向側に流れる気流を妨げる抵抗手段として、背面側熱交換器8aのリアガイダ11との対向部に抵抗板17を有する。並設する複数のフィン14において、フィン14の下流側端面に複数のフィン14に亘って板状に抵抗板17を設けた。抵抗板17は例えばステンレス板であり、背面側熱交換器8aとリアガイダ11の背面側熱交換器8aの下流側端面に、例えば回転軸方向、即ちフィン14の積層方向に伸びるようにステンレス板17を固着している。ステンレス板17は、背面側熱交換器8aを気流の下流側からその端面に略垂直方向に上流側を見たときに最下流列のパイプ15と重ならない位置に固着され、さらに背面側熱交換器8aの下側から順に存在するパイプ間に、例えば2箇所に設けられている。
また、ステンレス板17の幅L、段方向パイプ間距離DP、パイプ15の直径Dとしたとき、L/(DP−D)が例えば0.5以上となるようにステンレス板17を構成する。
FIG. 7 is a perspective view showing a part of the back-side heat exchanger 8a according to another configuration of the air conditioner according to this embodiment. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.
In this configuration example, as a resistance means for preventing an airflow flowing from the suction port 4 through the back side heat exchanger 8a to the side opposite to the back side heat exchanger 8a of the rear guider 11, there is a contact with the rear guider 11 of the back side heat exchanger 8a. A resistance plate 17 is provided at the opposing portion. In the plurality of fins 14 arranged side by side, a resistance plate 17 is provided in a plate shape across the plurality of fins 14 on the downstream end face of the fin 14. The resistance plate 17 is, for example, a stainless steel plate, and extends to the downstream side end face of the back side heat exchanger 8a and the back side heat exchanger 8a of the rear guider 11 so as to extend, for example, in the rotation axis direction, that is, in the laminating direction of the fins 14. Is fixed. The stainless steel plate 17 is fixed to a position where it does not overlap with the pipes 15 in the most downstream row when the rear side heat exchanger 8a is viewed from the downstream side of the air flow to the end face thereof in the substantially vertical direction, and further, the rear side heat exchange is performed. Between the pipes existing in order from the lower side of the vessel 8a, for example, two places are provided.
Further, the stainless steel plate 17 is configured such that L / (DP−D) is, for example, 0.5 or more when the width L of the stainless steel plate 17, the distance DP between the stepwise pipes, and the diameter D of the pipe 15 are set.

空気調和機の動作については、図1の構成と同様であるので省略する。ここで、ステンレス板17は、背面側熱交換器8aの上流側から下流側へと流れる気流Pに対して抵抗となり、吸込口4からリアガイダ11の背面側熱交換器8aとの対向側に流れる気流を妨げるように作用する。即ち、リアガイダ11の背面側からリアガイダ先端部11aに回り込む気流の流量は少なくなり、流速が遅くなる。そのため、渦領域Sの渦は小さくなる。NZ音の発生源である渦領域の渦Sを小さくすることで、低騒音化を図ることができる。   The operation of the air conditioner is the same as that of FIG. Here, the stainless steel plate 17 becomes a resistance against the air flow P flowing from the upstream side to the downstream side of the back side heat exchanger 8a, and flows from the suction port 4 to the side opposite to the back side heat exchanger 8a of the rear guider 11. Acts to block airflow. That is, the flow rate of the airflow that flows from the rear side of the rear guider 11 to the rear guider tip 11a is reduced, and the flow velocity is reduced. Therefore, the vortex in the vortex region S becomes small. Noise can be reduced by reducing the vortex S in the vortex region that is the source of the NZ sound.

また、ステンレス板17のパイプ15と重ならない部分の幅L、ここではステンレス板17のフィン長手方向の幅L、熱交換器8aの段方向パイプ間距離DP、パイプ直径Dに対し、L/(DP−D)とNZ音レベルは図4に示す関係がある。即ち、L/(DP−D)≧0.5とするとNZ音レベルは急激に改善される。   Further, the width L of the portion of the stainless steel plate 17 that does not overlap the pipe 15, here the width L in the fin longitudinal direction of the stainless steel plate 17, the distance DP between the pipes in the stage direction of the heat exchanger 8 a, and the pipe diameter D DP-D) and the NZ sound level have the relationship shown in FIG. That is, when L / (DP−D) ≧ 0.5, the NZ sound level is drastically improved.

なお、図7に示した構成では、背面側熱交換器8aを下流側から略垂直に上流側に見て最下流列のパイプ15と重ならない位置にステンレス板17を設けているが、これに限るものではない。少なくとも最下流列のパイプ15と重ならない位置にステンレス板17が存在すれば、最下流列のパイプ15と重なる部分にさらにステンレス板17が存在してもよい。即ち領域Kにも抵抗体が設けられていてもよい。
ただし、その場合には図4に示す関係のフィン倒しの幅Lは、1つのパイプ間に対して最下流列のパイプ15に重ならない領域(DP−D)におけるステンレス板17のフィン長手方向の長さとする。少なくとも最下流のパイプ15と重ならない位置にL/(DP−D)≧0.5のステンレス板17が存在すれば、最下流のパイプ15と重なる部分にさらにステンレス板17が存在しても、流量を減らす効果は同程度、または同程度以上となるため、NZ音を低減する効果が得られる。
In the configuration shown in FIG. 7, the stainless steel plate 17 is provided at a position where the rear side heat exchanger 8a is not substantially overlapped with the pipe 15 in the most downstream row when viewed from the downstream side substantially vertically to the upstream side. It is not limited. If the stainless steel plate 17 exists at least at a position that does not overlap with the pipes 15 in the most downstream row, the stainless steel plate 17 may further exist in a portion that overlaps with the pipes 15 in the most downstream row. That is, a resistor may also be provided in the region K.
However, in this case, the fin tilting width L in the relationship shown in FIG. 4 is in the fin longitudinal direction of the stainless steel plate 17 in the region (DP-D) that does not overlap the pipe 15 in the most downstream row with respect to one pipe. Length. If there is a stainless plate 17 of L / (DP-D) ≧ 0.5 at least at a position that does not overlap with the most downstream pipe 15, even if there is a stainless plate 17 in a portion that overlaps with the most downstream pipe 15, Since the effect of reducing the flow rate is about the same or more than the same, the effect of reducing the NZ sound can be obtained.

また、ここではステンレス板17を2箇所としたが、1箇所以上設ければ、NZ音低減の効果は得られる。ステンレス板17を複数個設ける際は、リアガイダ先端部11a付近の流量を落とすために、背面側熱交換器8aのパイプ間に対応する位置で、下方の一端側から上方の吸込口4側に向かって順番にステンレス板17を設けるのが望ましい。熱交換器8aの下方のパイプ間から順に上方に向かってパイプ間毎にステンレス板17を設けることで、リアガイダ11付近の気流の流量を効果的に低減できる。 In addition, here, the stainless plate 17 is provided in two places, but if one or more places are provided, the effect of reducing the NZ sound can be obtained. When a plurality of stainless steel plates 17 are provided, in order to reduce the flow rate in the vicinity of the rear guider tip 11a, the lower end is directed from the lower end to the upper suction port 4 at a position corresponding to the pipe of the rear heat exchanger 8a. It is desirable to provide the stainless steel plate 17 in order. By providing the stainless steel plate 17 between the pipes below the heat exchanger 8a in order, the flow rate of the airflow in the vicinity of the rear guider 11 can be effectively reduced.

また、フィンふさぎ領域の上端位置(mm)とNZ音レベル(dB)の関係は図5と同様の関係がある。即ち、ステンレス板17を背面側熱交換器8aの下方からパイプ間に対応する位置に順次設けていった場合、垂線Aの位置にフィンふさぎ領域の上端位置が達するまでは、徐々にNZ音レベルが低減していく。さらに、垂線Aと背面側熱交換器8aとの交点の位置までフィンふさぎ領域が達した後は、それ以上に吸込口4側にステンレス板17を設けても、NZ音レベルはそれ以上に改善されない。 The relationship between the upper end position (mm) of the fin blocking area and the NZ sound level (dB) is the same as that in FIG. That is, when the stainless steel plate 17 is sequentially provided at a position corresponding to the space between the pipes from the lower side of the back side heat exchanger 8a, the NZ sound level is gradually increased until the upper end position of the fin blocking area reaches the position of the perpendicular A. Will decrease. Furthermore, after the fin blocking area reaches the position of the intersection of the perpendicular line A and the back side heat exchanger 8a, the NZ sound level can be further improved even if the stainless steel plate 17 is provided on the suction port 4 side. Not.

このことから、リアガイダ先端部11a付近では垂線Aの位置に応じてステンレス板17を設けると、NZ音レベルを効果的に低減できる。具体的にはフィン倒し16の場合と同様、リアガイダの先端部11aからフィン14の長手方向に対して略垂直に下ろした垂線Aが通る位置の気流の最下流列のパイプ間を含み、フィン14の長手方向でリアガイダ11との対向部に位置する最下流列のパイプ間であって、熱交換器8aを前記気流の下流側からその端面に略垂直方向に上流側を見たときに、少なくとも最下流列のパイプ15に重ならない領域にステンレス板17を設けることにより、NZ音レベルを効果的に低減できる。図7に示す垂線Aの位置はその一例を示しており、熱交換器8aの下方のパイプ間から順に吸込口4側に向かって垂線Aが通っている位置のパイプ間にまでステンレス板17を設けており、NZ音レベルを大きく低減できる。 For this reason, if the stainless steel plate 17 is provided in the vicinity of the rear guider tip 11a according to the position of the perpendicular A, the NZ sound level can be effectively reduced. Specifically, as in the case of the fin faller 16, it includes a space between the pipes in the most downstream row of the airflow at a position where a perpendicular line A drawn from the front end portion 11 a of the rear guider substantially perpendicular to the longitudinal direction of the fin 14 passes. At least when the heat exchanger 8a is viewed from the downstream side of the airflow to the end surface thereof in a direction substantially perpendicular to the end surface of the pipe located between the pipes in the most downstream row located in the longitudinal direction of the rear guider 11. By providing the stainless steel plate 17 in a region that does not overlap with the pipes 15 in the most downstream row, the NZ sound level can be effectively reduced. The position of the perpendicular line A shown in FIG. 7 shows an example, and the stainless steel plate 17 is placed between the pipes below the heat exchanger 8a and the pipes at the position where the perpendicular line A passes toward the suction port 4 in order. The NZ sound level can be greatly reduced.

また、背面側熱交換器8aを出た気流は、熱交換器8aと垂直の方向に吹き出るため、リアガイダ11の長さや熱交換器8aの段方向パイプ間距離DPが図1と異なる場合でも、前述のようにステンレス板17を設けることで、NZ音を低減できる効果がある。即ち、前述のリアガイダ11の形状におけるどのような制約条件も満足でき、かつ騒音低減の効果を奏するので、使用者が快適に使用できる空気調和機を得ることができる。 In addition, since the airflow that has exited the back side heat exchanger 8a is blown in a direction perpendicular to the heat exchanger 8a, even if the length of the rear guider 11 and the distance DP between the stage direction pipes of the heat exchanger 8a are different from those in FIG. Providing the stainless steel plate 17 as described above has an effect of reducing NZ sound. That is, any constraint condition in the shape of the above-described rear guider 11 can be satisfied and an effect of noise reduction can be obtained, so that an air conditioner that can be comfortably used by the user can be obtained.

また、このステンレス板17を固着する方法は、例えば接着剤でフィン下流側端面に接着してもよいし、フィン14に凹部を設けてはめ込むようにしてもよい。またフィン積層方向の両端部または数箇所で何らかの固定部材を設けて固定してもよい。また、パイプ15に固定部材を設けてパイプ15に固定してもよい。さらにはリアガイダ11に固定部材を設け、熱交換器8aの下流側端面に押し付けるような固定方法など、どの様な方法を用いてもよい。   Further, as a method of fixing the stainless steel plate 17, for example, it may be adhered to the end surface on the downstream side of the fin with an adhesive, or the fin 14 may be provided with a recess to be fitted. Further, some fixing members may be provided and fixed at both ends or several places in the fin stacking direction. Further, a fixing member may be provided on the pipe 15 and fixed to the pipe 15. Furthermore, any method may be used such as a fixing method in which a fixing member is provided on the rear guider 11 and pressed against the downstream end face of the heat exchanger 8a.

また、ここでは抵抗板17をステンレス板としたが、板状のものであり、熱や水分に対して耐性の強い素材であれば他のものでも同様の効果を得られる。また、例えばアルミテープなど、テープ状のものでも同様の効果を得られる。 In addition, although the resistance plate 17 is a stainless plate here, the same effect can be obtained with other plates as long as the plate is plate-shaped and has a strong resistance to heat and moisture. The same effect can also be obtained with a tape-like material such as an aluminum tape.

また、図7のように、フィン14の積層方向に一枚の抵抗板でなくてもよく、複数の抵抗板で構成してもよい。また、並設されているフィン14の端から端まで全面に設けずに、送風機9の回転軸方向の一部分、または複数部分に設けてもよい。
また、図7では並設する複数のフィン14に対し、背面側熱交換器8aの下端から同じ位置になるように抵抗板17を設けたが、これに限るものではない。例えば、フィン14のそれぞれにおいて、フィン長手方向にずらした位置に斜めになるように抵抗板17を設けてもよい。
さらには、抵抗板17を熱交換器8aの下流側端面でなく、熱交換器端部の他の部分に固定してもよい。例えば、熱交換器8aの上流側端面や吸込口側と反対の下端面に固定する構成でも、吸込口4から熱交換器8aを通りリアガイダ11の熱交換器との対向側に流れる気流を妨げることができる。この構成でも、抵抗板17を設けない構成に比べ、リアガイダ11の背面側から先端部11aに回って流れる空気の流量を減少でき、NZ音レベルを低減できる。
Further, as shown in FIG. 7, a single resistor plate may not be provided in the stacking direction of the fins 14, and a plurality of resistor plates may be used. Moreover, you may provide in the part of the rotating shaft direction of the air blower 9, or several parts, without providing in the whole surface from the end of the fin 14 arranged in parallel.
Further, in FIG. 7, the resistance plate 17 is provided so as to be at the same position from the lower end of the back side heat exchanger 8 a for the plurality of fins 14 arranged side by side, but the present invention is not limited to this. For example, in each of the fins 14, the resistance plate 17 may be provided so as to be inclined at a position shifted in the longitudinal direction of the fin.
Furthermore, you may fix the resistance board 17 not to the downstream end surface of the heat exchanger 8a but to the other part of the heat exchanger end. For example, even in a configuration in which the heat exchanger 8a is fixed to the upstream end surface or the lower end surface opposite to the suction port side, the airflow flowing from the suction port 4 to the opposite side of the rear guider 11 through the heat exchanger 8a is obstructed. be able to. Even in this configuration, compared to a configuration in which the resistance plate 17 is not provided, the flow rate of air flowing from the rear side of the rear guider 11 to the tip portion 11a can be reduced, and the NZ sound level can be reduced.

以上のように、熱交換器8aを、並設する複数のフィン14の面が気流に沿うように配置し、熱交換器8aの下流側端面で複数のフィン14に亘って抵抗手段として板状の抵抗板17を設け、気流を妨げるように構成したことにより、流速が遅くなるため、渦領域Sの渦は小さくなって低騒音化できる。さらに、前述のリアガイダ11の形状におけるどのような制約条件も満足でき、かつ騒音低減の効果を奏するので、使用者が快適に使用できる空気調和機を得ることができる。 As described above, the heat exchanger 8a is arranged so that the surfaces of the plurality of fins 14 arranged in parallel are along the airflow, and the plate-like shape is used as a resistance means across the plurality of fins 14 on the downstream end surface of the heat exchanger 8a. Since the resistance plate 17 is provided so as to block the air flow, the flow velocity is slowed down, so that the vortex in the vortex region S is reduced and the noise can be reduced. Furthermore, since any restriction condition in the shape of the above-described rear guider 11 can be satisfied and an effect of noise reduction can be achieved, an air conditioner that can be used comfortably by the user can be obtained.

図8は、この実施の形態による空気調和機の他の構成例に係り、背面側熱交換器8aの一部を示す斜視図である。図において、図2と同一符号は同一、または相当部分を示す。
この構成例では、吸込口4から背面側熱交換器8aを通りリアガイダ11の背面側熱交換器8aとの対向側に流れる気流を妨げる抵抗手段として、背面側熱交換器8aのリアガイダ11との対向部に切り起こし18を有する。この部分のフィン14面を切り起こしてなる切り起こし18を設け、背面側熱交換器8aとリアガイダ11の間の気流の流量を低減させる抵抗体としている。気流Pは上流側から下流側へと流れるが、この切り起こし18は、フィン14の下流側端面よりも上流側のフィン面で、下流側端面に近い部位に設けられている。さらに、切り起こし18は、背面側熱交換器8aを気流の下流側から端面に略垂直に上流側を見たときに、最下流列のパイプ15と重ならない位置に設けられている。また、最下流列のパイプ間で、フィンの長手方向の下方の一端から吸込口4側に向かって順に例えば2箇所に設けられている。
FIG. 8 is a perspective view showing a part of the back-side heat exchanger 8a according to another configuration example of the air conditioner according to this embodiment. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts.
In this configuration example, as a resistance means for preventing an airflow flowing from the suction port 4 through the back side heat exchanger 8a to the side opposite to the back side heat exchanger 8a of the rear guider 11, there is a contact with the rear guider 11 of the back side heat exchanger 8a. A cut-and-raised portion 18 is provided at the opposite portion. A cut-and-raised portion 18 formed by cutting and raising the surface of the fin 14 in this portion is provided, and the resistor is used to reduce the flow rate of the airflow between the back-side heat exchanger 8a and the rear guider 11. The air flow P flows from the upstream side to the downstream side, and the cut and raised portion 18 is provided at a portion near the downstream end surface on the fin surface upstream of the downstream end surface of the fin 14. Furthermore, the cut-and-raised part 18 is provided at a position where the rear-side heat exchanger 8a does not overlap with the pipes 15 in the most downstream row when the upstream side is viewed from the downstream side of the airflow to the end surface substantially perpendicularly to the end face. Moreover, it is provided in two places in order toward the suction inlet 4 side from the lower end of the longitudinal direction of a fin between the pipes of the most downstream row | line | column.

切り起こし18はフィン14を長手方向に切り欠き、切り欠いた部分を折り曲げ、気流に対して抵抗となるようにフィン面から立ち上げて形成する。フィン14をコの字状に切り欠いて切り起こし18を構成すれば、図9(a)に断面構成を示すように、ほぼ垂直で長方形に突出する切り起こし18が形成され、気流に対する抵抗体として効果的である。ここで、並設するフィンの積層間隔と同程度の切り込みを気流の流れ方向にいれて切り起こし18を形成すれば、切り起こし18によってフィン14間は積層方向(即ち、送風機9の回転軸方向)にほぼ完全に塞がれる。
ここで、フィンの長手方向での切り起こし18の幅Lと、段方向パイプ間のパイプと重ならない部分の距離(DP−D)の比L/(DP−D)が例えば0.5以上となるように切り起こし18を構成する。
The cut-and-raised portion 18 is formed by cutting the fin 14 in the longitudinal direction, bending the cut-out portion, and rising from the fin surface so as to be resistant to airflow. If the fin 14 is cut out in a U-shape to form the cut-and-raised part 18, the cut-and-raised part 18 that is substantially vertical and protrudes in a rectangular shape is formed as shown in FIG. As effective. Here, if cuts approximately the same as the stacking interval of the fins arranged side by side are inserted in the airflow direction to form the cut-and-raised portions 18, the cut-and-raised portions 18 form the gaps between the fins 14 (that is, the rotation axis direction of the fan 9 ) Is almost completely blocked.
Here, the ratio L / (DP-D) of the width L of the cut and raised portion 18 in the longitudinal direction of the fin and the distance (DP-D) of the portion that does not overlap the pipe between the stepwise pipes is 0.5 or more, for example. The cut-and-raised part 18 is configured as follows.

空気調和機の動作については、図1と同様であるので省略する。ここで、切り起こし18は、背面側熱交換器8aの上流側から下流側へと流れる気流Pに対して抵抗となり、吸込口4からリアガイダ11の背面側熱交換器8aとの対向側に流れる気流を妨げるように作用する。即ち、リアガイダ11の背面側からリアガイダ先端部11aに回り込む空気の流量は少なくなり、流速が遅くなる。そのため、渦領域Sの渦は小さくなる。NZ音の発生源である渦領域の渦Sを小さくすることで、低騒音化を図ることができる。   The operation of the air conditioner is the same as in FIG. Here, the cut-and-raised 18 becomes a resistance against the airflow P flowing from the upstream side to the downstream side of the back side heat exchanger 8a, and flows from the suction port 4 to the side opposite to the back side heat exchanger 8a of the rear guider 11. Acts to block airflow. That is, the flow rate of the air that flows from the rear side of the rear guider 11 to the rear guider tip portion 11a is reduced, and the flow velocity is reduced. Therefore, the vortex in the vortex region S becomes small. Noise can be reduced by reducing the vortex S in the vortex region that is the source of the NZ sound.

なお、図8に示した構成では、切り起こし18によって並設するフィン14の積層間隔が塞がれる程度にフィン14を切り起こして構成したが、これに限るものではない。並設するフィン14の積層間隔が完全に塞がれなくても、吸込口4から背面側熱交換器8aを通りリアガイダ11の背面側熱交換器8aとの対向側、即ち領域Qに流れる気流を妨げるように切り起こし18を設けることで、切り起こし18を設けない場合に比べてNZ音を低減できる。 In the configuration shown in FIG. 8, the fins 14 are cut and raised to such an extent that the stacking interval of the fins 14 arranged in parallel by the cut and raised portions 18 is blocked, but the present invention is not limited to this. Even if the stacking interval of the fins 14 arranged side by side is not completely blocked, the airflow flows from the suction port 4 through the back side heat exchanger 8a to the opposite side of the rear guider 11 to the back side heat exchanger 8a, that is, to the region Q. By providing the cut-and-raised 18 so as to prevent the NZ noise, the NZ sound can be reduced compared to the case where the cut-and-raised 18 is not provided.

また、切り起こし18のパイプ15と重ならない部分の幅L、ここでは切り起こし18のフィン長手方向の幅L、熱交換器8aの段方向パイプ間距離DP、パイプ直径Dに対し、L/(DP−D)とNZ音レベルは図4に示す関係がある。即ち、L/(DP−D)≧0.5とするとNZ音レベルが急激に改善される。   Further, the width L of the portion of the cut and raised portion 18 that does not overlap the pipe 15, here the width L in the fin longitudinal direction of the cut and raised portion 18, the distance DP between the pipes in the stage direction of the heat exchanger 8 a, and the pipe diameter D DP-D) and the NZ sound level have the relationship shown in FIG. That is, when L / (DP−D) ≧ 0.5, the NZ sound level is drastically improved.

また、図8に示した構成では、背面側熱交換器8aを下流側から略垂直に上流側に見て最下流列のパイプ15と重ならない位置に切り起こし18を設けているが、これに限るものではない。少なくとも最下流列のパイプ15と重ならない位置に切り起こし18が存在すれば、最下流列のパイプ15と重なる部分にさらにス切り起こし18が存在してもよい。即ち領域Kにも抵抗体が設けられていてもよい。
ただし、その場合には図4に示す関係の切り起こしの幅Lは、1つのパイプ間に対して最下流列のパイプ15に重ならない領域(DP−D)における切り起こし18のフィン長手方向の長さとする。
Further, in the configuration shown in FIG. 8, the rear heat exchanger 8a is cut and raised at a position where it does not overlap with the pipe 15 in the most downstream row when viewed from the downstream side substantially vertically to the upstream side. It is not limited. If there is a cut and raised 18 at a position that does not overlap with at least the pipe 15 in the most downstream row, a further cut and raised 18 may exist in a portion that overlaps with the pipe 15 in the most downstream row. That is, a resistor may also be provided in the region K.
In this case, however, the cut-and-raised width L of the relationship shown in FIG. Length.

また、フィンふさぎ領域の上端位置(mm)とNZ音レベル(dB)の関係は図5と同様の関係がある。即ち、切り起こし18を背面側熱交換器8aの下方からパイプ間に対応する位置に順次設けていった場合、垂線Aの位置にフィンふさぎ領域の上端位置が達するまでは、徐々にNZ音レベルが低減していく。さらに、垂線Aと背面側熱交換器8aとの交点の位置までフィンふさぎ領域が達した後は、それ以上に吸込口4側に切り起こし18を設けても、NZ音レベルはそれ以上に改善されない。 The relationship between the upper end position (mm) of the fin blocking area and the NZ sound level (dB) is the same as that in FIG. That is, when the cut and raised portions 18 are sequentially provided at positions corresponding to between the pipes from the lower side of the back side heat exchanger 8a, the NZ sound level is gradually increased until the upper end position of the fin blocking area reaches the position of the perpendicular line A. Will decrease. Furthermore, after the fin blocking area has reached the position of the intersection of the perpendicular line A and the back side heat exchanger 8a, the NZ sound level can be further improved even if a cut 18 is provided on the suction port 4 side. Not.

このことから、リアガイダ先端部11a付近では垂線Aの位置に応じて切り起こし18を設けると、NZ音レベルを効果的に低減できる。具体的にはフィン倒し16の場合と同様、リアガイダの先端部11aからフィン14の長手方向に対して略垂直に下ろした垂線Aが通る位置の気流の最下流列のパイプ間を含み、フィン14の長手方向でリアガイダ11との対向部に位置する最下流列のパイプ間であって、熱交換器8aを前記気流の下流側からその端面に略垂直方向に上流側を見たときに、少なくとも最下流列のパイプ15に重ならない領域に抵抗体として切り起こし18を設けることにより、NZ音レベルを効果的に低減できる。図8に示す垂線Aの位置はその一例を示しており、熱交換器8aの下方のパイプ間から順に吸込口4側に向かって垂線Aが通っている位置のパイプ間にまで切り起こし18を設ければ、NZ音レベルを大きく低減できる。 For this reason, the NZ sound level can be effectively reduced by providing the cut-and-raised portion 18 in the vicinity of the rear guider tip 11a in accordance with the position of the perpendicular A. Specifically, as in the case of the fin faller 16, it includes a space between the pipes in the most downstream row of the airflow at a position where a perpendicular line A drawn from the front end portion 11 a of the rear guider substantially perpendicular to the longitudinal direction of the fin 14 passes. At least when the heat exchanger 8a is viewed from the downstream side of the airflow to the end surface thereof in a direction substantially perpendicular to the end surface of the pipe located between the pipes in the most downstream row located in the longitudinal direction of the rear guider 11. The NZ sound level can be effectively reduced by providing the cut-out 18 as a resistor in a region that does not overlap the pipe 15 in the most downstream row. The position of the perpendicular A shown in FIG. 8 shows an example thereof, and the cut 18 is raised between the pipes below the heat exchanger 8a to the pipe at the position where the perpendicular A passes toward the suction port 4 in order. If provided, the NZ sound level can be greatly reduced.

また、背面側熱交換器8aを出た気流は、熱交換器8aと垂直の方向に吹き出るため、リアガイダ11の長さや熱交換器8aの段方向パイプ間距離DPが図1と異なる場合でも、前述のように切り起こし18を設けることで、NZ音を低減できる効果がある。即ち、前述のリアガイダ11の形状におけるどのような制約条件も満足でき、かつ騒音低減の効果を奏するので、使用者が快適に使用できる空気調和機を得ることができる。 In addition, since the airflow that has exited the back side heat exchanger 8a is blown in a direction perpendicular to the heat exchanger 8a, even if the length of the rear guider 11 and the distance DP between the stage direction pipes of the heat exchanger 8a are different from those in FIG. Providing the cut and raised 18 as described above has an effect of reducing NZ sound. That is, any constraint condition in the shape of the above-described rear guider 11 can be satisfied and an effect of noise reduction can be obtained, so that an air conditioner that can be comfortably used by the user can be obtained.

なお、ここでは切り起こし18を2箇所としたが、1箇所以上設ければ、NZ音低減の効果は得られる。切り起こし18を複数個設ける際は、リアガイダ先端部11a付近の流量を落とすために、背面側熱交換器8aのパイプ間に相当する部分で下から順番に切り起こし18を設けるのが望ましい。 In this example, the cut and raised portions 18 are provided at two places. However, if one or more places are provided, the effect of reducing the NZ sound can be obtained. When a plurality of cut and raised portions 18 are provided, it is desirable to provide the cut and raised portions 18 in order from the bottom in the portion corresponding to the space between the pipes of the rear side heat exchanger 8a in order to reduce the flow rate near the rear guider tip 11a.

また、切り起こし18は、図9(a)のような形状に限るものではなく、フィン14の長手方向に切り欠いて、切り欠いた上流側を立ち上げて図9(b)のように構成してもよいし、切り欠いた下流側を押圧して立ち上げて図9(c)のように構成してもよい。また、切り起こす形状は、四角形としたが、三角形や半円形など、どのような形状でもよい。切り起こし18が気流に対して抵抗となるように構成すればよい。 Further, the cut-and-raised part 18 is not limited to the shape as shown in FIG. 9A, but is cut out in the longitudinal direction of the fin 14, and the cut-out upstream side is raised and configured as shown in FIG. 9B. Alternatively, the cut-out downstream side may be pressed to rise and configured as shown in FIG. The shape to be cut out is a quadrangle, but may be any shape such as a triangle or a semicircle. What is necessary is just to comprise so that the cut-and-raised 18 may become resistance with respect to an airflow.

また、図8では並設する複数のフィン14に対し、背面側熱交換器8aの下端から同じ位置に切り起こし18を設けたが、これに限るものではない。例えば、フィン14のそれぞれにおいて、フィン長手方向にずらした位置に切り起こし18を設けてもよい。   Further, in FIG. 8, the plurality of fins 14 arranged side by side are cut and raised at the same position from the lower end of the back side heat exchanger 8a, but this is not restrictive. For example, in each of the fins 14, the cut and raised portions 18 may be provided at positions shifted in the fin longitudinal direction.

また、図8に示した構成では、背面側熱交換器8aのリアガイダ11との対向部に切り起こし18を設けるとしたが、これに限るものではない。吸込口4から背面側熱交換器8aを通り、リアガイダ11の背面側熱交換器8aとの対向側に流れる気流を妨げるように切り起こし18を設ければよい。例えば背面側熱交換器8aの端部で上流側のフィン14の部分や、背面側熱交換器8aの下端面のフィン14の部分も、吸込口4から背面側熱交換器8aを通り、リアガイダ11の背面側熱交換器8aとの対向側に流れる気流の通り道であるので、この部分に流れに対して抵抗手段となるフィン倒しを設けてもよい。 Moreover, in the structure shown in FIG. 8, although the cut-and-raised part 18 was provided in the opposing part with the rear guider 11 of the back surface side heat exchanger 8a, it is not restricted to this. What is necessary is just to provide the cut-and-raised part 18 so that the airflow which flows through the back surface side heat exchanger 8a from the suction inlet 4 and the back surface side heat exchanger 8a of the rear guider 11 may be prevented. For example, the fin 14 on the upstream side at the end of the rear side heat exchanger 8a and the fin 14 on the lower end surface of the rear side heat exchanger 8a also pass through the rear side heat exchanger 8a from the suction port 4, and the rear guider. 11 is a passage of the airflow flowing on the side opposite to the rear surface side heat exchanger 8a, and therefore, a fin fall which serves as a resistance means against the flow may be provided in this portion.

以上のように、熱交換器8aの並設する複数のフィン14の面が気流に沿うように配置し、抵抗手段を、フィン14の一部を切り起こして気流を妨げるように構成した切り起こし18としたことにより、リアガイダの形状などの設計自由度に影響することなく、簡単な構成で、効果的にNZ音を低減することができる。 As described above, the heat exchanger 8a is arranged in parallel so that the surfaces of the plurality of fins 14 arranged along the air flow, and the resistance means is configured to cut and raise the fin 14 so as to block the air flow. By adopting 18, the NZ sound can be effectively reduced with a simple configuration without affecting the design freedom such as the shape of the rear guider.

また、図2、図7、図8において、フィン14の長手方向でリアガイダ11との対向部に位置する最下流列のパイプ間のすべてにおいて抵抗体16、17、18を設けたが、これに限るものではない。フィン14の長手方向でリアガイダ11との対向部に位置する最下流列のパイプ間の一部に抵抗体を設けてもよい。例えば図2において、抵抗体16をフィン14の長手方向の下側のみまたは上側のみに設ける構成でも、ある程度の効果を奏する。   2, 7, and 8, resistors 16, 17, and 18 are provided in all of the pipes in the most downstream row located in the longitudinal direction of the fin 14 and facing the rear guider 11. It is not limited. You may provide a resistor in a part between the pipes of the most downstream line located in the opposing part with the rear guider 11 in the longitudinal direction of the fin 14. FIG. For example, in FIG. 2, even if the resistor 16 is provided only on the lower side or the upper side in the longitudinal direction of the fins 14, a certain effect can be obtained.

実施の形態2.
図10は、この発明の実施の形態2による空気調和機に係り、背面側熱交換器8aの一部を示す斜視図である。図において、図2と同一符号は同一、または相当部分を示す。背面側熱交換器8aの下流側端面には、吸込口4から背面側熱交換器8aを通りリアガイダ11の背面側熱交換器8aとの対向部に流れる気流を妨げる抵抗手段として抵抗板19を有する。ここでは、背面側熱交換器8aのリアガイダ11との対向部である下流側端面に、例えば板状で多孔を有する金網19を固着し、背面側熱交換器8aとリアガイダ11の間の気流の流量を低減させる抵抗体としている。気流Pは上流側から下流側へと流れるが、この金網19は、並設されている複数のフィン14に亘って、背面側熱交換器8aのリアガイダ11の対向部付近に設ける。
Embodiment 2. FIG.
FIG. 10 relates to an air conditioner according to Embodiment 2 of the present invention, and is a perspective view showing a part of a back side heat exchanger 8a. In the figure, the same reference numerals as those in FIG. 2 denote the same or corresponding parts. On the downstream end face of the back side heat exchanger 8a, a resistance plate 19 is provided as a resistance means for preventing airflow flowing from the suction port 4 through the back side heat exchanger 8a to the opposite side of the rear guider 11 with the back side heat exchanger 8a. Have. Here, for example, a sheet-like, perforated metal mesh 19 is fixed to the downstream end face of the rear side heat exchanger 8a facing the rear guider 11, and the airflow between the rear side heat exchanger 8a and the rear guider 11 is fixed. It is a resistor that reduces the flow rate. Although the air flow P flows from the upstream side to the downstream side, the wire mesh 19 is provided in the vicinity of the opposing portion of the rear guider 11 of the back side heat exchanger 8a across the plurality of fins 14 arranged in parallel.

空気調和機の動作については、実施の形態1と同様であるので省略する。ここで、背面側熱交換器8aのリアガイダ11に対向する付近に金網19を設けており、金網19を設けた部分を流れる流量は低減する。これにつれて、リアガイダ11の背面側からリアガイダ先端部11aに回り込む空気の流量は少なくなり、流速が遅くなる。そのため、渦領域Sの渦は小さくなる。NZ音の発生源である渦領域の渦Sを小さくすることで、低騒音化を図ることができる。 About operation | movement of an air conditioner, since it is the same as that of Embodiment 1, it abbreviate | omits. Here, a metal mesh 19 is provided in the vicinity of the rear side heat exchanger 8a facing the rear guider 11, and the flow rate flowing through the portion provided with the metal mesh 19 is reduced. Along with this, the flow rate of the air that flows from the rear side of the rear guider 11 to the rear guider tip portion 11a decreases, and the flow velocity decreases. Therefore, the vortex in the vortex region S becomes small. Noise can be reduced by reducing the vortex S in the vortex region that is the source of the NZ sound.

この実施の形態では板状の多孔を有する抵抗体を熱交換器8aの端部に設けることで、気流に対する抵抗となると共に気流をある程度通過させるという機能を発揮する。ある程度気流を通過させることで熱交換性能を保持し、ファン入力の上昇を防ぐことができる。実施の形態1におけるステンレス板は最下流列のパイプ間の1箇所または複数箇所に設けた構成であったが、金網19のように多孔を有する抵抗板を用いると、1枚設けることで騒音を低減できる。また、位置あわせも綿密に行う必要がなく容易に取り付けることができる。   In this embodiment, a resistor having a plate-like porosity is provided at the end of the heat exchanger 8a, thereby providing resistance to the airflow and allowing the airflow to pass to some extent. By passing the airflow to some extent, the heat exchange performance can be maintained and the fan input can be prevented from rising. The stainless steel plate in the first embodiment is configured to be provided at one or a plurality of locations between the pipes in the most downstream row. However, if a resistance plate having a porosity such as a wire mesh 19 is used, noise is generated by providing one plate. Can be reduced. Further, it is not necessary to perform the positioning carefully and can be easily attached.

なお、実施の形態1と同様、リアガイダ11の長さや背面側熱交換器8aの段方向パイプ間距離DPがこの実施の形態と異なる場合でも、フィンふさぎ領域の上端位置(mm)とNZ音レベル(dB)の関係は図5と同様である。即ち、背面側熱交換器8aのリアガイダ11に対向する部分で、リアガイダ先端部11aから背面側熱交換器8aに引いた垂線Aと背面側熱交換器8aとの交点の高さまで金網19を設けると、NZ音レベルを大きく低減できるので望ましい。 As in the first embodiment, even when the length of the rear guider 11 and the distance DP between the pipes in the rear side heat exchanger 8a are different from this embodiment, the upper end position (mm) of the fin blocking area and the NZ sound level The relationship (dB) is the same as in FIG. That is, the wire mesh 19 is provided up to the height of the intersection of the vertical line A drawn from the rear guider tip 11a to the backside heat exchanger 8a and the backside heat exchanger 8a at the portion facing the rear guider 11 of the backside heat exchanger 8a. This is desirable because the NZ sound level can be greatly reduced.

また、ここでは抵抗体を金網としたが、気流を通過させると同時にある程度抵抗となる多孔を有するものならどのようなものでもよい。例えばメッシュ状のものでもよい。ただし、使用環境から熱や水分に対して耐性の強い素材であれば、他のものでも同様の効果を得られる。
また、この金網19を固着する方法は、実施の形態1における抵抗板と同様の方法が考えられる。例えば接着してもよいし、凹凸によってはめ込んだり、固定部材で固定してもよい。金網19の場合には多孔の部分で引っ掛けるような固定部材を使ってもよい。
In addition, although the resistor is a metal mesh here, any resistor may be used as long as it has a porosity that allows a certain amount of resistance while passing an air flow. For example, a mesh shape may be used. However, the same effect can be obtained with other materials as long as they are resistant to heat and moisture from the usage environment.
Further, as the method for fixing the wire mesh 19, the same method as the resistance plate in the first embodiment can be considered. For example, it may be adhered, or may be fitted by unevenness, or may be fixed by a fixing member. In the case of the wire mesh 19, a fixing member that is hooked at a porous portion may be used.

また、図10のように、フィン14の積層方向に一枚の抵抗板でなくてもよく、複数の抵抗板で構成してもよい。また、並設されているフィン14の端から端まで全面に設けずに、送風機9の回転軸方向の一部分、または複数部分に設けてもよい。
さらには、金網19を熱交換器8aの下流側端面でなく、熱交換器端部の他の部分に固定してもよい。例えば、熱交換器8aの上流側端面や吸込口側と反対の下端面に固定する構成でも、吸込口4から熱交換器8aを通りリアガイダ11の熱交換器との対向側に流れる気流を妨げることができる。このため、金網19を設けない構成に比べ、リアガイダ11の背面側から先端部11aに回って流れる空気の流量を減少でき、NZ音レベルを低減できる。
Further, as shown in FIG. 10, a single resistor plate may not be provided in the stacking direction of the fins 14, and a plurality of resistor plates may be used. Moreover, you may provide in the part of the rotating shaft direction of the air blower 9, or several parts, without providing in the whole surface from the end of the fin 14 arranged in parallel.
Furthermore, the wire mesh 19 may be fixed not to the downstream end face of the heat exchanger 8a but to other parts of the heat exchanger end. For example, even in a configuration in which the heat exchanger 8a is fixed to the upstream end surface or the lower end surface opposite to the suction port side, the airflow flowing from the suction port 4 to the opposite side of the rear guider 11 through the heat exchanger 8a is obstructed. be able to. For this reason, compared with the structure which does not provide the metal mesh 19, the flow volume of the air which flows around the front-end | tip part 11a from the back side of the rear guider 11 can be reduced, and a NZ sound level can be reduced.

以上のように、熱交換器8aは、並設する複数のフィン14の面が気流に沿うように配置され、抵抗手段は、熱交換器8aの下流側端面で複数のフィン14に亘って板状の抵抗板19を設け、気流を妨げるように構成したことにより、流速が遅くなるため、渦領域Sの渦は小さくなって低騒音化できる。また、リアガイダ11の形状におけるどのような制約条件も満足でき、かつ騒音低減の効果を奏するので、使用者が快適に使用できる空気調和機を得ることができる。 As described above, the heat exchanger 8a is arranged so that the surfaces of the plurality of fins 14 arranged in parallel are along the airflow, and the resistance means is a plate across the plurality of fins 14 on the downstream end surface of the heat exchanger 8a. Since the resistance plate 19 is provided to block the airflow, the flow velocity is slowed down, so that the vortex in the vortex region S is reduced and the noise can be reduced. Moreover, since any restriction condition in the shape of the rear guider 11 can be satisfied and the effect of noise reduction can be achieved, an air conditioner that can be used comfortably by the user can be obtained.

また、実施の形態1、2で述べた抵抗手段を1つに限らず、1つの空気調和機で複数種類を設けてもよい。例えば切り起こしとフィン倒しを混在させてもよい。   Further, the resistance means described in the first and second embodiments is not limited to one, and a plurality of types may be provided by one air conditioner. For example, it is possible to mix cutting and raising.

上記のように、この発明による空気調和機は、空気調和機の室内機に内蔵され、室内空気と熱交換する熱交換器と、この熱交換器からの室内空気を導く吸込口および吹出口を有する風路と、この風路内に配置され、前記吸込口からの前記室内空気を前記吹出口に送風する貫流送風機と、を具備した空気調和機の送風装置において、リアガイダ上端付近を通過する気流の流量を減らす手段を設けて構成したので、NZ音を低減し、かつリアガイダ成形上の制約条件との両立、熱交換器から垂れる露をリアガイダ部で受ける機能との両立、組立時に熱交換器を挿入する際の作業性との両立など、他の制約条件との両立を可能にでき、使用者が快適に利用できる空気調和機を廉価に提供できるという効果を有する。   As described above, an air conditioner according to the present invention is built in an indoor unit of an air conditioner, and includes a heat exchanger that exchanges heat with room air, and a suction port and an air outlet that guide room air from the heat exchanger. An airflow that passes through the vicinity of the upper end of the rear guider in a blower of an air conditioner that includes an air passage that is disposed in the air passage and the cross-flow blower that blows the room air from the suction port to the air outlet. Since it is configured with a means to reduce the flow rate of the air flow, it reduces NZ noise and is compatible with the constraints on the rear guider molding, compatible with the function of receiving dew dripping from the heat exchanger at the rear guider, and heat exchanger during assembly It is possible to achieve compatibility with other constraint conditions such as compatibility with workability when inserting the air conditioner, and to provide an air conditioner that can be used comfortably by the user at low cost.

この発明の実施の形態1による空気調和機を示す断面構成図である。It is a section lineblock diagram showing the air harmony machine by Embodiment 1 of this invention. この発明の実施の形態1に係る背面側熱交換器の一部を示す斜視図である。It is a perspective view which shows a part of back side heat exchanger which concerns on Embodiment 1 of this invention. この発明の実施の形態1に係り、リアガイダ付近の気流を説明する説明図である。It is explanatory drawing in connection with Embodiment 1 of this invention and explaining the airflow near a rear guider. この発明の実施の形態1に係る空気調和機に係り、フィン倒し部の幅L、熱交換器の段方向パイプ間距離DP、パイプ直径Lとしたとき、L/(DP−D)とNZ音レベル(dB)の関係を示すグラフである。The air conditioner according to Embodiment 1 of the present invention relates to L / (DP-D) and NZ sound, where fin fin width L, heat exchanger distance DP between pipes DP, and pipe diameter L are used. It is a graph which shows the relationship of a level (dB). この発明の実施の形態1に係る空気調和機において、熱交換器下端からフィン倒しを設けたときの、フィンふさぎ領域の上端位置(mm)とNZ音レベル(dB)の関係を示すグラフである。In the air conditioner concerning Embodiment 1 of this invention, it is a graph which shows the relationship between the upper end position (mm) of a fin blockage area | region, and a NZ sound level (dB) when providing a fin fall from the heat exchanger lower end. . この発明の実施の形態1に係り、リアガイダ付近の気流を説明する説明図である。It is explanatory drawing in connection with Embodiment 1 of this invention and explaining the airflow near a rear guider. この発明の実施の形態1に係る熱交換器の一部を示す斜視図である。It is a perspective view which shows a part of heat exchanger which concerns on Embodiment 1 of this invention. この発明の実施の形態1に係る熱交換器の一部を示す斜視図である。It is a perspective view which shows a part of heat exchanger which concerns on Embodiment 1 of this invention. この発明の実施の形態1に係る熱交換器のフィンを示す断面構成図である。It is a section lineblock diagram showing the fin of the heat exchanger concerning Embodiment 1 of this invention. この発明の実施の形態2に係る熱交換器の一部を示す斜視図である。It is a perspective view which shows a part of heat exchanger which concerns on Embodiment 2 of this invention.

符号の説明Explanation of symbols

1 空気調和機筐体
4 吸込口
6 吹出口
8 熱交換器
8a 背面側熱交換器
9 送風機
10 羽根車
11 リアガイダ
11a リアガイダ先端部
14 フィン
15 パイプ
16 抵抗体
17 抵抗板
18 抵抗体
19 抵抗板
A 垂線
DESCRIPTION OF SYMBOLS 1 Air conditioner housing | casing 4 Suction inlet 6 Outlet 8 Heat exchanger 8a Back surface side heat exchanger 9 Blower 10 Impeller 11 Rear guider 11a Rear guider tip 14 Fin 15 Pipe 16 Resistor 17 Resistor plate 18 Resistor 19 Resistor plate A Perpendicular

Claims (6)

空気調和機筐体内に格納される送風機と、前記送風機の吸入側に前記送風機を囲むように設けられ、吸込口から流入する気流に沿うように複数のフィンの面が並設して配置され、前記気流と熱交換する熱交換器と、前記空気調和機筐体内の背面側に配置される前記熱交換器の端部に対向すると共に前記送風機に対向して設けられ、前記熱交換した気体が前記送風機の吹出側に導かれるように風路の一部を形成するリアガイダと、前記熱交換器の前記リアガイダとの対向部に設けられ、前記フィンの積層間隔が塞がれる程度に、前記フィンの端部の一部を押し曲げまたは押し下げて構成したフィン倒し、または前記フィンの一部を切り起こして構成した切り起こしである抵抗体とを備え、
前記抵抗体は、前記吸込口から前記熱交換器を通り前記リアガイダの前記熱交換器との対向側に流れる気流が前記リアガイダの上端部を回り込んで前記送風機の翼と干渉して発生する音を低減することを特徴とする空気調和機。
A blower that is stored in an air conditioner casing, provided so as to surround the air blower to the suction side of the blower, a plurality of surfaces of the fins along the airflow flowing from suction plug mouth are arranged side by side A heat exchanger that exchanges heat with the airflow, and an end of the heat exchanger that is disposed on the back side in the air conditioner casing and that faces the blower and exchanges the heat. The rear guider that forms a part of the air path so as to be guided to the blowout side of the blower, and the rear guideer of the heat exchanger are provided at the facing portion, and the stacking interval of the fins is blocked. A resistor that is a fin fall configured by pushing and bending or pushing down a part of the end of the fin, or a cut and raised constituted by cutting and raising a part of the fin,
The resistor is a sound generated by the airflow flowing from the suction port through the heat exchanger to the opposite side of the rear guider to the heat exchanger around the upper end of the rear guider and interfering with the blades of the blower. An air conditioner characterized by reducing the pressure.
空気調和機筐体内に格納される送風機と、前記送風機の吸入側に前記送風機を囲むように設けられ、吸込口から流入する気流に沿うように複数のフィンの面が並設して配置され、前記気流と熱交換する熱交換器と、前記空気調和機筐体内の背面側に配置される前記熱交換器の端部に対向すると共に前記送風機に対向して設けられ、前記熱交換した気体が前記送風機の吹出側に導かれるように風路の一部を形成するリアガイダと、前記熱交換器の下流側端面で複数の前記フィンに亘って設けた抵抗板である抵抗体とを備え、
前記抵抗体は、前記吸込口から前記熱交換器を通り前記リアガイダの前記熱交換器との対向側に流れる気流が前記リアガイダの上端部を回り込んで前記送風機の翼と干渉して発生する音を低減することを特徴とする空気調和機。
A blower that is stored in an air conditioner casing, provided so as to surround the air blower to the suction side of the blower, a plurality of surfaces of the fins along the airflow flowing from suction plug mouth are arranged side by side A heat exchanger that exchanges heat with the airflow, and an end of the heat exchanger that is disposed on the back side in the air conditioner casing and that faces the blower and exchanges the heat. A rear guider that forms part of the air path so that the air guide is led to the blowout side of the blower, and a resistor that is a resistance plate provided across the plurality of fins on the downstream end face of the heat exchanger,
The resistor is a sound generated by the airflow flowing from the suction port through the heat exchanger to the opposite side of the rear guider to the heat exchanger around the upper end of the rear guider and interfering with the blades of the blower. An air conditioner characterized by reducing the pressure.
前記熱交換器は、並設する複数のフィンと前記フィンの面を略垂直に複数段及び複数列で貫通するパイプを有し、前記フィンの面が前記気流に沿うように配置され、前記抵抗体は、前記熱交換器を前記気流の下流側からその端面に略垂直方向に上流側を見たときに、前記熱交換器を構成する前記パイプの最下流列に重ならない領域を少なくとも含むように設けられたことを特徴とする請求項1または請求項2に記載の空気調和機。 The heat exchanger has a plurality of fins arranged side by side and a pipe that penetrates the surfaces of the fins in a plurality of stages and a plurality of rows substantially perpendicularly, and the fin surfaces are arranged along the air flow, and the resistance The body includes at least a region that does not overlap the most downstream row of the pipes constituting the heat exchanger when the heat exchanger is viewed from the downstream side of the air flow to the upstream side in a direction substantially perpendicular to the end surface thereof. The air conditioner according to claim 1 or 2, wherein the air conditioner is provided. 最下流列を構成する前記パイプのうちの1つのパイプ間において、前記熱交換器を前記気流の下流側からその端面に略垂直方向に上流側を見たときに、前記1つのパイプ間に対して前記最下流列のパイプに重ならない領域における前記抵抗体のフィン長手方向の長さLが、前記パイプ間距離DP及び前記パイプの直径Dとして、L/(DP−D)≧0.5となるように前記抵抗体を構成したことを特徴とする請求項3記載の空気調和機。 When the heat exchanger is viewed from the downstream side of the airflow to the end surface thereof in a direction substantially perpendicular to the end surface between the one of the pipes constituting the most downstream row, the space between the pipes The length L in the fin longitudinal direction of the resistor in the region that does not overlap with the pipe in the most downstream row is L / (DP−D) ≧ 0.5 as the distance DP between the pipes and the diameter D of the pipe. The air conditioner according to claim 3 , wherein the resistor is configured as described above. 前記リアガイダの先端部から前記フィンの長手方向に対して略垂直に下ろした垂線が通る前記最下流列のパイプ間を含み、前記フィンの長手方向で前記リアガイダとの対向部に位置する前記最下流列のパイプ間であって、前記熱交換器を前記気流の下流側からその端面に略垂直方向に上流側を見たときに、少なくとも前記最下流列のパイプに重ならない領域に前記抵抗体を設けることを特徴とする請求項1乃至請求項4のいずれか1項に記載の空気調和機。 The most downstream side located between the pipes of the most downstream row through which a perpendicular line extending substantially perpendicularly to the longitudinal direction of the fin passes from the distal end portion of the rear guider, and located at a portion facing the rear guider in the longitudinal direction of the fin Between the pipes in a row, and when the heat exchanger is viewed from the downstream side of the airflow to the upstream side in a direction substantially perpendicular to the end face thereof, the resistor is disposed at least in a region that does not overlap the pipe in the most downstream row. The air conditioner according to any one of claims 1 to 4 , wherein the air conditioner is provided. 前記フィンの長手方向に対し、前記熱交換器の一端部から前記吸込口側に向かって、前記リアガイダとの対向部でかつ前記気流の最下流列のパイプ間に対応する位置に順に前記抵抗体を設けたことを特徴とする請求項1乃至請求項5のいずれか1項に記載の空気調和機。 With respect to the longitudinal direction of the fin, from the one end portion of the heat exchanger toward the suction port side, the resistors are sequentially arranged at positions corresponding to the rear guider and between the pipes in the most downstream row of the airflow. The air conditioner according to any one of claims 1 to 5, wherein the air conditioner is provided.
JP2005337017A 2005-11-22 2005-11-22 Air conditioner Active JP4697427B2 (en)

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